{ "dataset": "Gaithersburg, MD storm events — 12-month window, 25-mile radius plus Montgomery records (floods and special weather statements excluded, matching the city page)", "license": "https://www.stormauditor.com/data-license", "provenance": "Consolidated by StormAuditor from public NOAA/NWS records (warnings, Local Storm Reports, NCEI Storm Events) under the published methodology at https://www.stormauditor.com/methodology", "refreshed_at": "2026-09-20T10:25:18.271+00:00", "window_days": 365, "schema_version": "2.0.0", "event_count": 160, "fields": { "id": "stable event identifier (source-derived)", "date": "event date (YYYY-MM-DD, local storm day)", "county": "county or county-equivalent (may be blank)", "city": "place name from the source record (LSR names may carry a distance/direction prefix)", "zip": "ZIP code when the source provides one (may be blank)", "eventType": "hazard tag: wind | hail | tornado | flood | lightning", "severity": "StormAuditor severity bucket (low|moderate|high|severe)", "evidenceLevel": "evidence level of the source record (warning|observed|...)", "confidence": "StormAuditor confidence score for the record (0-1, may be absent)", "windSpeedMph": "reported/estimated wind gust, mph (absent if n/a)", "hailSizeInches": "reported/estimated hail size, inches (absent if n/a)", "tornadoScale": "EF-scale rating when the source provides one (absent if n/a)", "damageTypes": "damage tags from the source narrative (may be absent)", "description": "source narrative excerpt (may be absent)", "source": "originating public record (NWS warning, LSR, NCEI, ...)", "sourceDetail": "issuing office / product detail for the source (may be absent)", "originStation": "reporting station identifier when applicable (may be absent)", "warningProductKey": "NWS warning product key for warning-derived rows (may be absent)", "lat": "event latitude (WGS84, may be blank)", "lon": "event longitude (WGS84, may be blank)", "rawWindSpeedMph": "source-reported wind value before display screening, mph (may be absent)", "windSpeedDisclaimer": "set when the wind value is a warning-projected figure rather than a measurement (may be absent)" }, "events": [ { "id": "nws-alert-38dfab5b9f0169a1.002-Montgome-hail-2026-09-04", "lat": 38.93333333333334, "lon": -76.79944444444446, "zip": "", "city": "", "date": "2026-09-04", "county": "Montgomery", "source": "NWS Weather Alert", "severity": "moderate", "eventType": "hail", "confidence": 88, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning for Montgomery. Max hail: 0.75\". Severe Thunderstorm Warning issued September 4 at 12:09AM EDT until September 4 at 12:15AM EDT by NWS Baltimore MD/Washington DC", "sourceDetail": "NWS Baltimore MD/Washington DC — Severe Thunderstorm Warning Max hail: 0.75\".", "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-499" }, { "id": "nws-alert-fb51965633f68623.001-Montgome-wind-2026-09-04", "zip": "", "city": "", "date": "2026-09-04", "county": "Montgomery", "source": "NWS Weather Alert", "severity": "high", "eventType": "wind", "confidence": 72, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Severe Thunderstorm Watch for Montgomery. Severe Thunderstorm Watch issued September 4 at 2:04PM EDT until September 4 at 9:00PM EDT by NWS Baltimore MD/Washington DC", "sourceDetail": "NWS Baltimore MD/Washington DC — Severe Thunderstorm Watch", "windSpeedMph": 70, "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "warningProductKey": "LWX-SV-A-653" }, { "id": "nws-alert-a32ac20b118ec0d6.002-Montgome-wind-2026-09-03", "lat": 38.95388888888889, "lon": -76.83444444444446, "zip": "", "city": "", "date": "2026-09-03", "county": "Montgomery", "source": "NWS Weather Alert", "severity": "high", "eventType": "wind", "confidence": 88, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Severe Thunderstorm Warning for Montgomery. Max wind: 70 mph. Severe Thunderstorm Warning issued September 3 at 11:54PM EDT until September 4 at 12:15AM EDT by NWS Baltimore MD/Washington DC", "sourceDetail": "NWS Baltimore MD/Washington DC — Severe Thunderstorm Warning Max wind: 70 mph.", "windSpeedMph": 70, "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "warningProductKey": "LWX-SV-W-499" }, { "id": "nws-alert-8df2779c19e74aa6.001-Frederic-wind-2026-09-03", "lat": 39.394000000000005, "lon": -77.23599999999999, "zip": "", "city": "", "date": "2026-09-03", "county": "Frederick", "source": "NWS Weather Alert", "severity": "high", "eventType": "wind", "confidence": 88, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Severe Thunderstorm Warning for Frederick. Severe Thunderstorm Warning issued September 3 at 10:51PM EDT until September 3 at 11:00PM EDT by NWS Baltimore MD/Washington DC", "sourceDetail": "NWS Baltimore MD/Washington DC — Severe Thunderstorm Warning", "windSpeedMph": 60, "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "warningProductKey": "LWX-SV-W-491" }, { "id": "nws-alert-872c9d177266cf50.001-Frederic-hail-2026-09-03", "lat": 39.394000000000005, "lon": -77.23599999999999, "zip": "", "city": "", "date": "2026-09-03", "county": "Frederick", "source": "NWS Weather Alert", "severity": "high", "eventType": "hail", "confidence": 88, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning for Frederick. Max hail: 1\". Severe Thunderstorm Warning issued September 3 at 10:25PM EDT until September 3 at 11:00PM EDT by NWS Baltimore MD/Washington DC", "sourceDetail": "NWS Baltimore MD/Washington DC — Severe Thunderstorm Warning Max hail: 1\".", "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "hailSizeInches": 1, "warningProductKey": "LWX-SV-W-491" }, { "id": "ww-LWX-SV-W-491-2026-09-03-Montgomery-wind", "zip": "", "city": "", "date": "2026-09-03", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-09-03. Duration: 52 min. Counties: Carroll, Montgomery, Frederick, Howard. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #491 (52 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-491" }, { "id": "ww-LWX-SV-W-491-2026-09-03-Montgomery-hail", "zip": "", "city": "", "date": "2026-09-03", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-09-03. Duration: 52 min. Counties: Carroll, Montgomery, Frederick, Howard. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #491 (52 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-491" }, { "id": "ww-LWX-SV-W-497-2026-09-03-Montgomery-wind", "zip": "", "city": "", "date": "2026-09-03", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-09-03. Duration: 47 min. County: Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #497 (47 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-497" }, { "id": "ww-LWX-SV-W-497-2026-09-03-Montgomery-hail", "zip": "", "city": "", "date": "2026-09-03", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-09-03. Duration: 47 min. County: Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #497 (47 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-497" }, { "id": "nws-alert-59184b17c4b7a1eb.001-Baltimor-wind-2026-09-02", "lat": 39.26545454545454, "lon": -77.17909090909092, "zip": "", "city": "", "date": "2026-09-02", "county": "Baltimore", "source": "NWS Weather Alert", "severity": "high", "eventType": "wind", "confidence": 88, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Severe Thunderstorm Warning for Baltimore. Severe Thunderstorm Warning issued September 2 at 1:28PM EDT until September 2 at 1:30PM EDT by NWS Baltimore MD/Washington DC", "sourceDetail": "NWS Baltimore MD/Washington DC — Severe Thunderstorm Warning", "windSpeedMph": 60, "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "warningProductKey": "LWX-SV-W-461" }, { "id": "nws-alert-7427630116978049.001-Baltimor-hail-2026-09-02", "lat": 39.26545454545454, "lon": -77.17909090909092, "zip": "", "city": "", "date": "2026-09-02", "county": "Baltimore", "source": "NWS Weather Alert", "severity": "moderate", "eventType": "hail", "confidence": 88, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning for Baltimore. Max hail: 0.75\". Severe Thunderstorm Warning issued September 2 at 1:10PM EDT until September 2 at 1:30PM EDT by NWS Baltimore MD/Washington DC", "sourceDetail": "NWS Baltimore MD/Washington DC — Severe Thunderstorm Warning Max hail: 0.75\".", "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-461" }, { "id": "nws-alert-59184b17c4b7a1eb.001-Carroll-wind-2026-09-02", "lat": 39.26545454545454, "lon": -77.17909090909092, "zip": "", "city": "", "date": "2026-09-02", "county": "Carroll", "source": "NWS Weather Alert", "severity": "high", "eventType": "wind", "confidence": 88, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Severe Thunderstorm Warning for Carroll. Severe Thunderstorm Warning issued September 2 at 1:28PM EDT until September 2 at 1:30PM EDT by NWS Baltimore MD/Washington DC", "sourceDetail": "NWS Baltimore MD/Washington DC — Severe Thunderstorm Warning", "windSpeedMph": 60, "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "warningProductKey": "LWX-SV-W-461" }, { "id": "nws-alert-7427630116978049.001-Carroll-hail-2026-09-02", "lat": 39.26545454545454, "lon": -77.17909090909092, "zip": "", "city": "", "date": "2026-09-02", "county": "Carroll", "source": "NWS Weather Alert", "severity": "moderate", "eventType": "hail", "confidence": 88, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning for Carroll. Max hail: 0.75\". Severe Thunderstorm Warning issued September 2 at 1:10PM EDT until September 2 at 1:30PM EDT by NWS Baltimore MD/Washington DC", "sourceDetail": "NWS Baltimore MD/Washington DC — Severe Thunderstorm Warning Max hail: 0.75\".", "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-461" }, { "id": "nws-alert-59184b17c4b7a1eb.001-Frederic-wind-2026-09-02", "lat": 39.26545454545454, "lon": -77.17909090909092, "zip": "", "city": "", "date": "2026-09-02", "county": "Frederick", "source": "NWS Weather Alert", "severity": "high", "eventType": "wind", "confidence": 88, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Severe Thunderstorm Warning for Frederick. Severe Thunderstorm Warning issued September 2 at 1:28PM EDT until September 2 at 1:30PM EDT by NWS Baltimore MD/Washington DC", "sourceDetail": "NWS Baltimore MD/Washington DC — Severe Thunderstorm Warning", "windSpeedMph": 60, "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "warningProductKey": "LWX-SV-W-461" }, { "id": "nws-alert-7427630116978049.001-Frederic-hail-2026-09-02", "lat": 39.26545454545454, "lon": -77.17909090909092, "zip": "", "city": "", "date": "2026-09-02", "county": "Frederick", "source": "NWS Weather Alert", "severity": "moderate", "eventType": "hail", "confidence": 88, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning for Frederick. Max hail: 0.75\". Severe Thunderstorm Warning issued September 2 at 1:10PM EDT until September 2 at 1:30PM EDT by NWS Baltimore MD/Washington DC", "sourceDetail": "NWS Baltimore MD/Washington DC — Severe Thunderstorm Warning Max hail: 0.75\".", "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-461" }, { "id": "nws-alert-59184b17c4b7a1eb.001-Howard-wind-2026-09-02", "lat": 39.26545454545454, "lon": -77.17909090909092, "zip": "", "city": "", "date": "2026-09-02", "county": "Howard", "source": "NWS Weather Alert", "severity": "high", "eventType": "wind", "confidence": 88, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Severe Thunderstorm Warning for Howard. Severe Thunderstorm Warning issued September 2 at 1:28PM EDT until September 2 at 1:30PM EDT by NWS Baltimore MD/Washington DC", "sourceDetail": "NWS Baltimore MD/Washington DC — Severe Thunderstorm Warning", "windSpeedMph": 60, "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "warningProductKey": "LWX-SV-W-461" }, { "id": "nws-alert-59184b17c4b7a1eb.001-Montgome-wind-2026-09-02", "lat": 39.26545454545454, "lon": -77.17909090909092, "zip": "", "city": "", "date": "2026-09-02", "county": "Montgomery", "source": "NWS Weather Alert", "severity": "high", "eventType": "wind", "confidence": 88, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Severe Thunderstorm Warning for Montgomery. Severe Thunderstorm Warning issued September 2 at 1:28PM EDT until September 2 at 1:30PM EDT by NWS Baltimore MD/Washington DC", "sourceDetail": "NWS Baltimore MD/Washington DC — Severe Thunderstorm Warning", "windSpeedMph": 60, "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "warningProductKey": "LWX-SV-W-461" }, { "id": "nws-alert-7427630116978049.001-Montgome-hail-2026-09-02", "lat": 39.26545454545454, "lon": -77.17909090909092, "zip": "", "city": "", "date": "2026-09-02", "county": "Montgomery", "source": "NWS Weather Alert", "severity": "moderate", "eventType": "hail", "confidence": 88, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning for Montgomery. Max hail: 0.75\". Severe Thunderstorm Warning issued September 2 at 1:10PM EDT until September 2 at 1:30PM EDT by NWS Baltimore MD/Washington DC", "sourceDetail": "NWS Baltimore MD/Washington DC — Severe Thunderstorm Warning Max hail: 0.75\".", "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-461" }, { "id": "ww-LWX-SV-W-455-2026-08-27-Frederick-hail", "lat": 39.284000000000006, "lon": -77.31400000000001, "zip": "", "city": "", "date": "2026-08-27", "county": "Frederick", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-08-27. Duration: 49 min. Counties: Carroll, Frederick, Howard, Montgomery. Storm tags: wind: 60.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #455 (49 min)", "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "hailSizeInches": 1, "warningProductKey": "LWX-SV-W-455" }, { "id": "ww-LWX-SV-W-455-2026-08-27-Howard-hail", "lat": 39.284000000000006, "lon": -77.31400000000001, "zip": "", "city": "", "date": "2026-08-27", "county": "Howard", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-08-27. Duration: 49 min. Counties: Carroll, Frederick, Howard, Montgomery. Storm tags: wind: 60.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #455 (49 min)", "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "hailSizeInches": 1, "warningProductKey": "LWX-SV-W-455" }, { "id": "ww-LWX-SV-W-455-2026-08-27-Carroll-hail", "lat": 39.284000000000006, "lon": -77.31400000000001, "zip": "", "city": "", "date": "2026-08-27", "county": "Carroll", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-08-27. Duration: 49 min. Counties: Carroll, Frederick, Howard, Montgomery. Storm tags: wind: 60.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #455 (49 min)", "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "hailSizeInches": 1, "warningProductKey": "LWX-SV-W-455" }, { "id": "ww-LWX-SV-W-455-2026-08-27-Montgomery-wind", "zip": "", "city": "", "date": "2026-08-27", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-08-27. Duration: 49 min. Counties: Carroll, Frederick, Howard, Montgomery. Storm tags: wind: 60.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #455 (49 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-455" }, { "id": "ww-LWX-SV-W-455-2026-08-27-Montgomery-hail", "lat": 39.284000000000006, "lon": -77.31400000000001, "zip": "", "city": "", "date": "2026-08-27", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-08-27. Duration: 49 min. Counties: Carroll, Frederick, Howard, Montgomery. Storm tags: wind: 60.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #455 (49 min)", "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "hailSizeInches": 1, "warningProductKey": "LWX-SV-W-455" }, { "id": "ww-LWX-SV-W-453-2026-08-27-Montgomery-wind", "zip": "", "city": "", "date": "2026-08-27", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-08-27. Duration: 40 min. Counties: Frederick, Montgomery, Washington. Storm tags: wind: 60.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #453 (40 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-453" }, { "id": "ww-LWX-SV-W-453-2026-08-27-Montgomery-hail", "zip": "", "city": "", "date": "2026-08-27", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-08-27. Duration: 40 min. Counties: Frederick, Montgomery, Washington. Storm tags: wind: 60.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #453 (40 min)", "evidenceLevel": "warning", "hailSizeInches": 1, "warningProductKey": "LWX-SV-W-453" }, { "id": "nws-alert-dc8e8dfc05a12b08.001-Montgome-wind-2026-08-27", "zip": "", "city": "", "date": "2026-08-27", "county": "Montgomery", "source": "NWS Weather Alert", "severity": "high", "eventType": "wind", "confidence": 72, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Severe Thunderstorm Watch for Montgomery. Severe Thunderstorm Watch issued August 27 at 9:54PM EDT until August 27 at 10:00PM EDT by NWS Baltimore MD/Washington DC", "sourceDetail": "NWS Baltimore MD/Washington DC — Severe Thunderstorm Watch", "windSpeedMph": 60, "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "warningProductKey": "LWX-SV-A-632" }, { "id": "ww-LWX-SV-W-432-2026-08-20-Montgomery-wind", "zip": "", "city": "", "date": "2026-08-20", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-08-20. Duration: 33 min. County: Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #432 (33 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-432" }, { "id": "ww-LWX-SV-W-432-2026-08-20-Montgomery-hail", "zip": "", "city": "", "date": "2026-08-20", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-08-20. Duration: 33 min. County: Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #432 (33 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-432" }, { "id": "ww-LWX-SV-W-431-2026-08-20-Montgomery-wind", "zip": "", "city": "", "date": "2026-08-20", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-08-20. Duration: 29 min. Counties: Frederick, Montgomery. Storm tags: wind: 60.0, hail: 0.75\", tornado: POSSIBLE. This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #431 (29 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-431" }, { "id": "ww-LWX-SV-W-431-2026-08-20-Montgomery-hail", "zip": "", "city": "", "date": "2026-08-20", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-08-20. Duration: 29 min. Counties: Frederick, Montgomery. Storm tags: wind: 60.0, hail: 0.75\", tornado: POSSIBLE. This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #431 (29 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-431" }, { "id": "nws-alert-1737cae4dafe2340.002-Montgome-wind-2026-08-16", "zip": "", "city": "", "date": "2026-08-16", "county": "Montgomery", "source": "NWS Weather Alert", "severity": "high", "eventType": "wind", "confidence": 72, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Severe Thunderstorm Watch for Montgomery. Severe Thunderstorm Watch issued August 16 at 8:11PM EDT until August 16 at 11:00PM EDT by NWS Baltimore MD/Washington DC", "sourceDetail": "NWS Baltimore MD/Washington DC — Severe Thunderstorm Watch", "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "warningProductKey": "LWX-SV-A-588" }, { "id": "nws-alert-d0d779de60e22c2f.001-Montgome-wind", "zip": "", "city": "Montgomery", "date": "2026-08-10", "county": "Montgomery", "source": "NWS Weather Alert", "severity": "high", "eventType": "wind", "confidence": 88, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Severe Thunderstorm Warning for Montgomery. Severe Thunderstorm Warning issued August 10 at 4:24PM EDT until August 10 at 4:45PM EDT by NWS Baltimore MD/Washington DC", "sourceDetail": "NWS Baltimore MD/Washington DC — Severe Thunderstorm Warning", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-393" }, { "id": "ww-LWX-SV-W-386-2026-08-10-Montgomery-hail", "zip": "", "city": "", "date": "2026-08-10", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-08-10. Duration: 60 min. Counties: Frederick, Montgomery. Storm tags: wind: 60.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #386 (60 min)", "evidenceLevel": "warning", "hailSizeInches": 1, "warningProductKey": "LWX-SV-W-386" }, { "id": "ww-LWX-SV-W-392-2026-08-10-Montgomery-wind", "zip": "", "city": "", "date": "2026-08-10", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-08-10. Duration: 50 min. Counties: Montgomery, Baltimore, Frederick, Harford, Howard, Carroll. Storm tags: wind: 70.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #392 (50 min)", "windSpeedMph": 70, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-392" }, { "id": "ww-LWX-SV-W-392-2026-08-10-Montgomery-hail", "zip": "", "city": "", "date": "2026-08-10", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-08-10. Duration: 50 min. Counties: Montgomery, Baltimore, Frederick, Harford, Howard, Carroll. Storm tags: wind: 70.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #392 (50 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-392" }, { "id": "nws-alert-d0d779de60e22c2f.001-Montgome-hail-2026-08-10", "lat": 39.146666666666675, "lon": -76.84333333333333, "zip": "", "city": "", "date": "2026-08-10", "county": "Montgomery", "source": "NWS Weather Alert", "severity": "high", "eventType": "hail", "confidence": 88, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning for Montgomery. Max hail: 0.75\". Severe Thunderstorm Warning issued August 10 at 4:24PM EDT until August 10 at 4:45PM EDT by NWS Baltimore MD/Washington DC", "sourceDetail": "NWS Baltimore MD/Washington DC — Severe Thunderstorm Warning Max hail: 0.75\".", "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "hailSizeInches": 1, "warningProductKey": "LWX-SV-W-393" }, { "id": "nws-alert-6839d0dbe9e4d31c.002-Montgome-wind-2026-08-10", "zip": "", "city": "", "date": "2026-08-10", "county": "Montgomery", "source": "NWS Weather Alert", "severity": "high", "eventType": "wind", "confidence": 72, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Severe Thunderstorm Watch for Montgomery. Severe Thunderstorm Watch issued August 10 at 4:43PM EDT until August 10 at 9:00PM EDT by NWS Baltimore MD/Washington DC", "sourceDetail": "NWS Baltimore MD/Washington DC — Severe Thunderstorm Watch", "windSpeedMph": 70, "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "warningProductKey": "LWX-SV-A-555" }, { "id": "ww-LWX-SV-W-386-2026-08-10-Montgomery-wind", "zip": "", "city": "", "date": "2026-08-10", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-08-10. Duration: 60 min. Counties: Frederick, Montgomery. Storm tags: wind: 60.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #386 (60 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-386" }, { "id": "ww-LWX-SV-W-357-2026-08-07-Montgomery-wind", "zip": "", "city": "", "date": "2026-08-07", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-08-07. Duration: 27 min. County: Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #357 (27 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-357" }, { "id": "ww-LWX-SV-W-357-2026-08-07-Montgomery-hail", "zip": "", "city": "", "date": "2026-08-07", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-08-07. Duration: 27 min. County: Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #357 (27 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-357" }, { "id": "nws-alert-4deeda51d8533b3f.001-Montgome-wind", "zip": "", "city": "Montgomery", "date": "2026-08-07", "county": "Montgomery", "source": "NWS Weather Alert", "severity": "high", "eventType": "wind", "confidence": 72, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Severe Thunderstorm Watch for Montgomery. Severe Thunderstorm Watch issued August 7 at 1:22PM EDT until August 7 at 9:00PM EDT by NWS Baltimore MD/Washington DC", "sourceDetail": "NWS Baltimore MD/Washington DC — Severe Thunderstorm Watch", "evidenceLevel": "warning", "warningProductKey": "LWX-SV-A-540" }, { "id": "ww-LWX-SV-W-347-2026-08-06-Montgomery-wind", "zip": "", "city": "", "date": "2026-08-06", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-08-06. Duration: 44 min. County: Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #347 (44 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-347" }, { "id": "ww-LWX-SV-W-347-2026-08-06-Montgomery-hail", "zip": "", "city": "", "date": "2026-08-06", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-08-06. Duration: 44 min. County: Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #347 (44 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-347" }, { "id": "ww-LWX-SV-W-324-2026-07-28-Montgomery-wind", "zip": "", "city": "", "date": "2026-07-28", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-28. Duration: 54 min. Counties: Baltimore, Howard, Carroll, Frederick, Montgomery. Storm tags: wind: 60.0, hail: 1.0\", tornado: POSSIBLE. This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #324 (54 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-324" }, { "id": "ww-LWX-SV-W-324-2026-07-28-Montgomery-hail", "zip": "", "city": "", "date": "2026-07-28", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-28. Duration: 54 min. Counties: Baltimore, Howard, Carroll, Frederick, Montgomery. Storm tags: wind: 60.0, hail: 1.0\", tornado: POSSIBLE. This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #324 (54 min)", "evidenceLevel": "warning", "hailSizeInches": 1, "warningProductKey": "LWX-SV-W-324" }, { "id": "ww-LWX-SV-W-337-2026-07-28-Montgomery-wind", "zip": "", "city": "", "date": "2026-07-28", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-28. Duration: 26 min. Counties: Montgomery, Prince George's. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #337 (26 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-337" }, { "id": "ww-LWX-SV-W-337-2026-07-28-Montgomery-hail", "zip": "", "city": "", "date": "2026-07-28", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-28. Duration: 26 min. Counties: Montgomery, Prince George's. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #337 (26 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-337" }, { "id": "ww-LWX-SV-W-333-2026-07-28-Montgomery-wind", "zip": "", "city": "", "date": "2026-07-28", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-28. Duration: 48 min. Counties: Howard, Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #333 (48 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-333" }, { "id": "ww-LWX-SV-W-333-2026-07-28-Montgomery-hail", "zip": "", "city": "", "date": "2026-07-28", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-28. Duration: 48 min. Counties: Howard, Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #333 (48 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-333" }, { "id": "ww-LWX-SV-W-341-2026-07-28-Montgomery-wind", "lat": 38.928333333333335, "lon": -77.08333333333333, "zip": "", "city": "", "date": "2026-07-28", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-28. Duration: 28 min. Counties: Montgomery, Prince George's. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #341 (28 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "warningProductKey": "LWX-SV-W-341" }, { "id": "ww-LWX-SV-W-341-2026-07-28-Montgomery-hail", "lat": 38.928333333333335, "lon": -77.08333333333333, "zip": "", "city": "", "date": "2026-07-28", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-28. Duration: 28 min. Counties: Montgomery, Prince George's. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #341 (28 min)", "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-341" }, { "id": "ww-LWX-SV-W-324-2026-07-28-Frederick-wind", "lat": 39.35333333333334, "lon": -77.11111111111111, "zip": "", "city": "", "date": "2026-07-28", "county": "Frederick", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-28. Duration: 54 min. Counties: Baltimore, Howard, Carroll, Frederick, Montgomery. Storm tags: wind: 60.0, hail: 1.0\", tornado: POSSIBLE. This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #324 (54 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "warningProductKey": "LWX-SV-W-324" }, { "id": "ww-LWX-SV-W-324-2026-07-28-Frederick-hail", "lat": 39.35333333333334, "lon": -77.11111111111111, "zip": "", "city": "", "date": "2026-07-28", "county": "Frederick", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-28. Duration: 54 min. Counties: Baltimore, Howard, Carroll, Frederick, Montgomery. Storm tags: wind: 60.0, hail: 1.0\", tornado: POSSIBLE. This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #324 (54 min)", "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "hailSizeInches": 1, "warningProductKey": "LWX-SV-W-324" }, { "id": "ww-LWX-SV-W-333-2026-07-28-Howard-wind", "lat": 39.154666666666664, "lon": -76.89933333333332, "zip": "", "city": "", "date": "2026-07-28", "county": "Howard", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-28. Duration: 48 min. Counties: Howard, Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #333 (48 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "warningProductKey": "LWX-SV-W-333" }, { "id": "ww-LWX-SV-W-333-2026-07-28-Howard-hail", "lat": 39.154666666666664, "lon": -76.89933333333332, "zip": "", "city": "", "date": "2026-07-28", "county": "Howard", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-28. Duration: 48 min. Counties: Howard, Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #333 (48 min)", "evidenceLevel": "warning", "originStation": "Baltimore MD/Washington DC Weather Station", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-333" }, { "id": "iem-lsr-2026-07-28-wind-38.96--76.94", "lat": 38.96, "lon": -76.94, "zip": "", "city": "Riverdale", "date": "2026-07-28", "county": "Prince Georges", "source": "IEM Local Storm Reports", "severity": "high", "eventType": "wind", "confidence": 0.92, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "A wind gust of 50 knots (58 MPH) was measured by a mesonet in Riverdale (AU722/KB3PHD).", "sourceDetail": "NWS LWX — Mesonet via Iowa Mesonet", "windSpeedMph": 58, "evidenceLevel": "observed" }, { "id": "iem-202607282225-wind-38.96--76.94", "lat": 38.96, "lon": -76.94, "zip": "", "city": "Riverdale", "date": "2026-07-28", "county": "Prince Georges", "source": "IEM Local Storm Reports", "severity": "high", "eventType": "wind", "confidence": 92, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "TSTM WND GST reported near Riverdale, MD. Peak gust: 67 mph.", "sourceDetail": "NWS LWX — Mesonet via Iowa Mesonet", "windSpeedMph": 67, "evidenceLevel": "observed" }, { "id": "ww-LWX-SV-W-294-2026-07-21-Montgomery-wind", "zip": "", "city": "", "date": "2026-07-21", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-21. Duration: 17 min. County: Montgomery. Storm tags: wind: 60.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #294 (17 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-294" }, { "id": "ww-LWX-SV-W-294-2026-07-21-Montgomery-hail", "zip": "", "city": "", "date": "2026-07-21", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-21. Duration: 17 min. County: Montgomery. Storm tags: wind: 60.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #294 (17 min)", "evidenceLevel": "warning", "hailSizeInches": 1, "warningProductKey": "LWX-SV-W-294" }, { "id": "ww-LWX-SV-W-289-2026-07-21-Montgomery-wind", "zip": "", "city": "", "date": "2026-07-21", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-21. Duration: 16 min. County: Montgomery. Storm tags: wind: 60.0, hail: 1.0\", tornado: POSSIBLE. This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #289 (16 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-289" }, { "id": "ww-LWX-SV-W-289-2026-07-21-Montgomery-hail", "zip": "", "city": "", "date": "2026-07-21", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-21. Duration: 16 min. County: Montgomery. Storm tags: wind: 60.0, hail: 1.0\", tornado: POSSIBLE. This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #289 (16 min)", "evidenceLevel": "warning", "hailSizeInches": 1, "warningProductKey": "LWX-SV-W-289" }, { "id": "ww-LWX-SV-W-274-2026-07-18-Montgomery-wind", "zip": "", "city": "", "date": "2026-07-18", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-18. Duration: 28 min. County: Montgomery. Storm tags: wind: 60.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #274 (28 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-274" }, { "id": "ww-LWX-SV-W-274-2026-07-18-Montgomery-hail", "zip": "", "city": "", "date": "2026-07-18", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-18. Duration: 28 min. County: Montgomery. Storm tags: wind: 60.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #274 (28 min)", "evidenceLevel": "warning", "hailSizeInches": 1, "warningProductKey": "LWX-SV-W-274" }, { "id": "ww-LWX-SV-W-269-2026-07-18-Montgomery-wind", "zip": "", "city": "", "date": "2026-07-18", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-18. Duration: 49 min. Counties: Frederick, Carroll, Montgomery, Howard, Washington. Storm tags: wind: 70.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #269 (49 min)", "windSpeedMph": 70, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-269" }, { "id": "ww-LWX-SV-W-269-2026-07-18-Montgomery-hail", "zip": "", "city": "", "date": "2026-07-18", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-18. Duration: 49 min. Counties: Frederick, Carroll, Montgomery, Howard, Washington. Storm tags: wind: 70.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #269 (49 min)", "evidenceLevel": "warning", "hailSizeInches": 1, "warningProductKey": "LWX-SV-W-269" }, { "id": "ww-LWX-SV-W-264-2026-07-18-Montgomery-wind", "zip": "", "city": "", "date": "2026-07-18", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-18. Duration: 49 min. Counties: Carroll, Frederick, Howard, Montgomery. Storm tags: wind: 70.0, hail: 1.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #264 (49 min)", "windSpeedMph": 70, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-264" }, { "id": "ww-LWX-SV-W-264-2026-07-18-Montgomery-hail", "zip": "", "city": "", "date": "2026-07-18", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-18. Duration: 49 min. Counties: Carroll, Frederick, Howard, Montgomery. Storm tags: wind: 70.0, hail: 1.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #264 (49 min)", "evidenceLevel": "warning", "hailSizeInches": 1.75, "warningProductKey": "LWX-SV-W-264" }, { "id": "iem-ww-LWX-TO-W-15-Montgomery-tornado-2026-07-18", "zip": "", "city": "Montgomery", "date": "2026-07-18", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "severe", "eventType": "tornado", "confidence": 0.85, "damageTypes": [ "Structural roof failure", "Debris penetration", "Complete shingle removal" ], "description": "TO W for Montgomery.", "sourceDetail": "NWS LWX — TO/W", "evidenceLevel": "warning", "warningProductKey": "LWX-TO-W-15" }, { "id": "iem-ww-LWX-TO-W-16-Montgomery-tornado-2026-07-18", "zip": "", "city": "Montgomery", "date": "2026-07-18", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "severe", "eventType": "tornado", "confidence": 0.85, "damageTypes": [ "Structural roof failure", "Debris penetration", "Complete shingle removal" ], "description": "TO W for Montgomery.", "sourceDetail": "NWS LWX — TO/W", "evidenceLevel": "warning", "warningProductKey": "LWX-TO-W-16" }, { "id": "ww-LWX-SV-W-246-2026-07-09-Montgomery-wind", "zip": "", "city": "", "date": "2026-07-09", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-09. Duration: 39 min. Counties: Montgomery, Frederick. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #246 (39 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-246" }, { "id": "ww-LWX-SV-W-246-2026-07-09-Montgomery-hail", "zip": "", "city": "", "date": "2026-07-09", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-09. Duration: 39 min. Counties: Montgomery, Frederick. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #246 (39 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-246" }, { "id": "ww-LWX-SV-W-248-2026-07-09-Montgomery-wind", "zip": "", "city": "", "date": "2026-07-09", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-09. Duration: 31 min. County: Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #248 (31 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-248" }, { "id": "ww-LWX-SV-W-248-2026-07-09-Montgomery-hail", "zip": "", "city": "", "date": "2026-07-09", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-09. Duration: 31 min. County: Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #248 (31 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-248" }, { "id": "ww-LWX-SV-W-247-2026-07-09-Montgomery-wind", "zip": "", "city": "", "date": "2026-07-09", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-09. Duration: 32 min. Counties: Carroll, Montgomery, Frederick, Howard. Storm tags: wind: 60.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #247 (32 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-247" }, { "id": "ww-LWX-SV-W-247-2026-07-09-Montgomery-hail", "zip": "", "city": "", "date": "2026-07-09", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-09. Duration: 32 min. Counties: Carroll, Montgomery, Frederick, Howard. Storm tags: wind: 60.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #247 (32 min)", "evidenceLevel": "warning", "hailSizeInches": 1, "warningProductKey": "LWX-SV-W-247" }, { "id": "ww-LWX-SV-W-231-2026-07-05-Montgomery-wind", "zip": "", "city": "", "date": "2026-07-05", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-05. Duration: 33 min. Counties: Prince George's, Howard, Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #231 (33 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-231" }, { "id": "ww-LWX-SV-W-231-2026-07-05-Montgomery-hail", "zip": "", "city": "", "date": "2026-07-05", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-05. Duration: 33 min. Counties: Prince George's, Howard, Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #231 (33 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-231" }, { "id": "ww-LWX-SV-W-227-2026-07-05-Montgomery-wind", "zip": "", "city": "", "date": "2026-07-05", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-05. Duration: 44 min. Counties: Howard, Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #227 (44 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-227" }, { "id": "ww-LWX-SV-W-227-2026-07-05-Montgomery-hail", "zip": "", "city": "", "date": "2026-07-05", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-05. Duration: 44 min. Counties: Howard, Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #227 (44 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-227" }, { "id": "ww-LWX-SV-W-228-2026-07-05-Montgomery-wind", "zip": "", "city": "", "date": "2026-07-05", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-05. Duration: 32 min. Counties: Anne Arundel, Howard, Montgomery, Prince George's. Storm tags: wind: 60.0, hail: 1.25\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #228 (32 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-228" }, { "id": "ww-LWX-SV-W-228-2026-07-05-Montgomery-hail", "zip": "", "city": "", "date": "2026-07-05", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-05. Duration: 32 min. Counties: Anne Arundel, Howard, Montgomery, Prince George's. Storm tags: wind: 60.0, hail: 1.25\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #228 (32 min)", "evidenceLevel": "warning", "hailSizeInches": 1.25, "warningProductKey": "LWX-SV-W-228" }, { "id": "ww-LWX-SV-W-230-2026-07-05-Montgomery-wind", "zip": "", "city": "", "date": "2026-07-05", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-05. Duration: 33 min. County: Montgomery. Storm tags: wind: 60.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #230 (33 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-230" }, { "id": "ww-LWX-SV-W-230-2026-07-05-Montgomery-hail", "zip": "", "city": "", "date": "2026-07-05", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-05. Duration: 33 min. County: Montgomery. Storm tags: wind: 60.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #230 (33 min)", "evidenceLevel": "warning", "hailSizeInches": 1, "warningProductKey": "LWX-SV-W-230" }, { "id": "ww-LWX-SV-W-224-2026-07-05-Montgomery-wind", "zip": "", "city": "", "date": "2026-07-05", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-05. Duration: 51 min. Counties: Carroll, Howard, Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #224 (51 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-224" }, { "id": "ww-LWX-SV-W-224-2026-07-05-Montgomery-hail", "zip": "", "city": "", "date": "2026-07-05", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-05. Duration: 51 min. Counties: Carroll, Howard, Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #224 (51 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-224" }, { "id": "spc-2026-07-05-89-2306", "lat": 39.18, "lon": -77.1, "zip": "", "city": "Olney", "date": "2026-07-05", "county": "Montgomery", "source": "SPC Storm Reports", "severity": "high", "eventType": "wind", "confidence": 90, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Measured wind gust from a trained spotter at the intersection of MD-108 and Zion Rd. (LWX)", "sourceDetail": "Storm Prediction Center verified report", "windSpeedMph": 60, "evidenceLevel": "reported" }, { "id": "iem-202607052306-wind-39.18--77.10", "lat": 39.18, "lon": -77.1, "zip": "", "city": "2 NNW Olney", "date": "2026-07-05", "county": "Montgomery", "source": "IEM Local Storm Reports", "severity": "high", "eventType": "wind", "confidence": 92, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "TSTM WND GST reported near 2 NNW Olney, MD. Peak gust: 69 mph.", "sourceDetail": "NWS LWX — Trained Spotter via Iowa Mesonet", "windSpeedMph": 69, "evidenceLevel": "reported" }, { "id": "ww-LWX-SV-W-211-2026-07-04-Montgomery-wind", "zip": "", "city": "", "date": "2026-07-04", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-04. Duration: 40 min. Counties: Carroll, Baltimore, Howard, Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #211 (40 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-211" }, { "id": "ww-LWX-SV-W-211-2026-07-04-Montgomery-hail", "zip": "", "city": "", "date": "2026-07-04", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-04. Duration: 40 min. Counties: Carroll, Baltimore, Howard, Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #211 (40 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-211" }, { "id": "ww-LWX-SV-W-205-2026-07-04-Montgomery-wind", "zip": "", "city": "", "date": "2026-07-04", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-04. Duration: 48 min. Counties: Howard, Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #205 (48 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-205" }, { "id": "ww-LWX-SV-W-205-2026-07-04-Montgomery-hail", "zip": "", "city": "", "date": "2026-07-04", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-07-04. Duration: 48 min. Counties: Howard, Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #205 (48 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-205" }, { "id": "spc-2026-07-04-137-2300", "lat": 39.38, "lon": -76.92, "zip": "", "city": "Henryton", "date": "2026-07-04", "county": "Carroll", "source": "SPC Storm Reports", "severity": "severe", "eventType": "wind", "confidence": 90, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "A wind gust of 70 knots (81 MPH) was measured by a trained spotter near the intersection of Ridge Road and Brangles Road. Hundreds of large trees blew down in the area. (LWX)", "sourceDetail": "Storm Prediction Center verified report", "windSpeedMph": 81, "evidenceLevel": "reported" }, { "id": "iem-202607042300-wind-39.38--76.92", "lat": 39.38, "lon": -76.92, "zip": "", "city": "2 N Henryton", "date": "2026-07-04", "county": "Carroll", "source": "IEM Local Storm Reports", "severity": "severe", "eventType": "wind", "confidence": 92, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "TSTM WND GST reported near 2 N Henryton, MD. Peak gust: 93 mph.", "sourceDetail": "NWS LWX — Trained Spotter via Iowa Mesonet", "windSpeedMph": 93, "evidenceLevel": "reported" }, { "id": "ww-LWX-SV-W-159-2026-06-22-Montgomery-wind", "zip": "", "city": "", "date": "2026-06-22", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-06-22. Duration: 40 min. Counties: Montgomery, Prince George's. Storm tags: wind: 60.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #159 (40 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-159" }, { "id": "ww-LWX-SV-W-159-2026-06-22-Montgomery-hail", "zip": "", "city": "", "date": "2026-06-22", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-06-22. Duration: 40 min. Counties: Montgomery, Prince George's. Storm tags: wind: 60.0, hail: 1.0\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #159 (40 min)", "evidenceLevel": "warning", "hailSizeInches": 1, "warningProductKey": "LWX-SV-W-159" }, { "id": "ww-LWX-SV-W-108-2026-06-12-Montgomery-wind", "zip": "", "city": "", "date": "2026-06-12", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-06-12. Duration: 25 min. County: Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #108 (25 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-108" }, { "id": "ww-LWX-SV-W-108-2026-06-12-Montgomery-hail", "zip": "", "city": "", "date": "2026-06-12", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-06-12. Duration: 25 min. County: Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #108 (25 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-108" }, { "id": "ww-LWX-SV-W-90-2026-06-11-Montgomery-wind", "zip": "", "city": "", "date": "2026-06-11", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-06-11. Duration: 42 min. Counties: Washington, Carroll, Frederick, Howard, Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #90 (42 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-90" }, { "id": "ww-LWX-SV-W-90-2026-06-11-Montgomery-hail", "zip": "", "city": "", "date": "2026-06-11", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-06-11. Duration: 42 min. Counties: Washington, Carroll, Frederick, Howard, Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #90 (42 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-90" }, { "id": "ww-LWX-SV-W-92-2026-06-11-Montgomery-wind", "zip": "", "city": "", "date": "2026-06-11", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-06-11. Duration: 36 min. Counties: Anne Arundel, Baltimore, Carroll, Charles, Frederick, Howard, Montgomery, Prince George's. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #92 (36 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-92" }, { "id": "ww-LWX-SV-W-92-2026-06-11-Montgomery-hail", "zip": "", "city": "", "date": "2026-06-11", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-06-11. Duration: 36 min. Counties: Anne Arundel, Baltimore, Carroll, Charles, Frederick, Howard, Montgomery, Prince George's. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #92 (36 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-92" }, { "id": "ww-LWX-SV-W-94-2026-06-11-Montgomery-wind", "zip": "", "city": "", "date": "2026-06-11", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-06-11. Duration: 61 min. Counties: Howard, Carroll, Montgomery, Prince George's, St. Mary's, Baltimore, Anne Arundel, Calvert, Cecil, Charles, Harford. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #94 (61 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-94" }, { "id": "ww-LWX-SV-W-94-2026-06-11-Montgomery-hail", "zip": "", "city": "", "date": "2026-06-11", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-06-11. Duration: 61 min. Counties: Howard, Carroll, Montgomery, Prince George's, St. Mary's, Baltimore, Anne Arundel, Calvert, Cecil, Charles, Harford. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #94 (61 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-94" }, { "id": "asos-bf-FDK-2026-06-11", "lat": 39.4176, "lon": -77.3743, "zip": "", "city": "FREDERICK MUNI APT", "date": "2026-06-11", "county": "Frederick", "source": "IEM ASOS Station", "severity": "moderate", "eventType": "wind", "confidence": 0.95, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "FREDERICK MUNI APT (FDK) recorded a 52 mph gust.", "sourceDetail": "MD_ASOS automated observation — FREDERICK MUNI APT (FDK) [365d backfill 2026-08]", "windSpeedMph": 52, "evidenceLevel": "observed" }, { "id": "ww-LWX-SV-W-78-2026-06-06-Montgomery-wind", "zip": "", "city": "", "date": "2026-06-06", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-06-06. Duration: 48 min. Counties: Howard, Montgomery, Baltimore, Frederick, Carroll. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #78 (48 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-78" }, { "id": "ww-LWX-SV-W-78-2026-06-06-Montgomery-hail", "zip": "", "city": "", "date": "2026-06-06", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-06-06. Duration: 48 min. Counties: Howard, Montgomery, Baltimore, Frederick, Carroll. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #78 (48 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-78" }, { "id": "ww-LWX-SV-W-79-2026-06-06-Montgomery-wind", "zip": "", "city": "", "date": "2026-06-06", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-06-06. Duration: 33 min. Counties: Montgomery, Prince George's, Anne Arundel, Baltimore, Howard. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #79 (33 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-79" }, { "id": "ww-LWX-SV-W-79-2026-06-06-Montgomery-hail", "zip": "", "city": "", "date": "2026-06-06", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-06-06. Duration: 33 min. Counties: Montgomery, Prince George's, Anne Arundel, Baltimore, Howard. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #79 (33 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-79" }, { "id": "ww-LWX-SV-W-76-2026-06-06-Montgomery-wind", "zip": "", "city": "", "date": "2026-06-06", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-06-06. Duration: 58 min. Counties: Washington, Frederick, Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #76 (58 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-76" }, { "id": "ww-LWX-SV-W-76-2026-06-06-Montgomery-hail", "zip": "", "city": "", "date": "2026-06-06", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-06-06. Duration: 58 min. Counties: Washington, Frederick, Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #76 (58 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-76" }, { "id": "asos-bf-FDK-2026-06-06", "lat": 39.4176, "lon": -77.3743, "zip": "", "city": "FREDERICK MUNI APT", "date": "2026-06-06", "county": "Frederick", "source": "IEM ASOS Station", "severity": "moderate", "eventType": "wind", "confidence": 0.95, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "FREDERICK MUNI APT (FDK) recorded a 52 mph gust.", "sourceDetail": "MD_ASOS automated observation — FREDERICK MUNI APT (FDK) [365d backfill 2026-08]", "windSpeedMph": 52, "evidenceLevel": "observed" }, { "id": "ncei-1314499-2026-03-16", "lon": 210556, "zip": "", "city": "DICKERSON", "date": "2026-03-16", "county": "Montgomery", "source": "NCEI Storm Events Database", "severity": "moderate", "eventType": "wind", "confidence": 0.95, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Wires blew down on Big Woods Road near Dickerson.", "sourceDetail": "Verified by Emergency Manager — NCEI Event #1314499", "windSpeedMph": 52, "evidenceLevel": "official_backfill" }, { "id": "ncei-1314500-2026-03-16", "lon": 210556, "zip": "", "city": "POOLESVILLE", "date": "2026-03-16", "county": "Montgomery", "source": "NCEI Storm Events Database", "severity": "high", "eventType": "wind", "confidence": 0.95, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "A large tree was uprooted onto a fence on Hersperger Road.", "sourceDetail": "Verified by Emergency Manager — NCEI Event #1314500", "windSpeedMph": 61, "evidenceLevel": "official_backfill" }, { "id": "ncei-1314502-2026-03-16", "lon": 210556, "zip": "", "city": "BOYDS", "date": "2026-03-16", "county": "Montgomery", "source": "NCEI Storm Events Database", "severity": "moderate", "eventType": "wind", "confidence": 0.95, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "A tree blew down onto a power line on White Ground Road just west of Taylor Fields.", "sourceDetail": "Verified by Emergency Manager — NCEI Event #1314502", "windSpeedMph": 52, "evidenceLevel": "official_backfill" }, { "id": "ncei-1314504-2026-03-16", "lon": 210556, "zip": "", "city": "CLARKSBURG", "date": "2026-03-16", "county": "Montgomery", "source": "NCEI Storm Events Database", "severity": "moderate", "eventType": "wind", "confidence": 0.95, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Wires blew down in the 22610 block of Wims Road.", "sourceDetail": "Verified by Emergency Manager — NCEI Event #1314504", "windSpeedMph": 52, "evidenceLevel": "official_backfill" }, { "id": "ncei-1314505-2026-03-16", "lon": 210556, "zip": "", "city": "CEDAR GROVE", "date": "2026-03-16", "county": "Montgomery", "source": "NCEI Storm Events Database", "severity": "moderate", "eventType": "wind", "confidence": 0.95, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Wires blew down in the 11400 block of Hawkes Road.", "sourceDetail": "Verified by Emergency Manager — NCEI Event #1314505", "windSpeedMph": 52, "evidenceLevel": "official_backfill" }, { "id": "ncei-1314521-2026-03-16", "lon": 210556, "zip": "", "city": "POTOMAC", "date": "2026-03-16", "county": "Montgomery", "source": "NCEI Storm Events Database", "severity": "moderate", "eventType": "wind", "confidence": 0.95, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "A tree blew down on Brent Road.", "sourceDetail": "Verified by Emergency Manager — NCEI Event #1314521", "windSpeedMph": 52, "evidenceLevel": "official_backfill" }, { "id": "ncei-1314522-2026-03-16", "lon": 210556, "zip": "", "city": "GLEN", "date": "2026-03-16", "county": "Montgomery", "source": "NCEI Storm Events Database", "severity": "moderate", "eventType": "wind", "confidence": 0.95, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "A tree blew down onto a house on Rouen Lane.", "sourceDetail": "Verified by Broadcast Media — NCEI Event #1314522", "windSpeedMph": 52, "evidenceLevel": "official_backfill" }, { "id": "ncei-1314523-2026-03-16", "lon": 210556, "zip": "", "city": "ROCKVILLE", "date": "2026-03-16", "county": "Montgomery", "source": "NCEI Storm Events Database", "severity": "moderate", "eventType": "wind", "confidence": 0.95, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "A tree blew down in the 900 block of Farm Haven Drive.", "sourceDetail": "Verified by Emergency Manager — NCEI Event #1314523", "windSpeedMph": 52, "evidenceLevel": "official_backfill" }, { "id": "ncei-1314524-2026-03-16", "lon": 210556, "zip": "", "city": "GLEN", "date": "2026-03-16", "county": "Montgomery", "source": "NCEI Storm Events Database", "severity": "moderate", "eventType": "wind", "confidence": 0.95, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "A tree blew down onto a house on Powder Horn Drive.", "sourceDetail": "Verified by Emergency Manager — NCEI Event #1314524", "windSpeedMph": 56, "evidenceLevel": "official_backfill" }, { "id": "ncei-1314525-2026-03-16", "lon": 210556, "zip": "", "city": "COMUS", "date": "2026-03-16", "county": "Montgomery", "source": "NCEI Storm Events Database", "severity": "moderate", "eventType": "wind", "confidence": 0.95, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "A tree blew down on MD-109 Old Hundred Road.", "sourceDetail": "Verified by Emergency Manager — NCEI Event #1314525", "windSpeedMph": 52, "evidenceLevel": "official_backfill" }, { "id": "ww-LWX-SV-W-18-2026-03-16-Montgomery-wind", "zip": "", "city": "", "date": "2026-03-16", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-03-16. Duration: 17 min. Counties: Frederick, Montgomery. Storm tags: wind: 70.0, hail: 0.75\", tornado: POSSIBLE. This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #18 (17 min)", "windSpeedMph": 70, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-18" }, { "id": "ww-LWX-SV-W-18-2026-03-16-Montgomery-hail", "zip": "", "city": "", "date": "2026-03-16", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-03-16. Duration: 17 min. Counties: Frederick, Montgomery. Storm tags: wind: 70.0, hail: 0.75\", tornado: POSSIBLE. This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #18 (17 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-18" }, { "id": "ww-LWX-SV-W-29-2026-03-16-Montgomery-wind", "zip": "", "city": "", "date": "2026-03-16", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-03-16. Duration: 42 min. Counties: Frederick, Anne Arundel, Baltimore, Carroll, Charles, Howard, Montgomery, Prince George's. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #29 (42 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-29" }, { "id": "ww-LWX-SV-W-29-2026-03-16-Montgomery-hail", "zip": "", "city": "", "date": "2026-03-16", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-03-16. Duration: 42 min. Counties: Frederick, Anne Arundel, Baltimore, Carroll, Charles, Howard, Montgomery, Prince George's. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #29 (42 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-29" }, { "id": "ww-LWX-SV-W-19-2026-03-16-Montgomery-wind", "zip": "", "city": "", "date": "2026-03-16", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-03-16. Duration: 50 min. Counties: Frederick, Baltimore, Montgomery, Washington, Carroll, Howard. Storm tags: wind: 60.0, hail: 0.75\", tornado: POSSIBLE. This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #19 (50 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-19" }, { "id": "ww-LWX-SV-W-19-2026-03-16-Montgomery-hail", "zip": "", "city": "", "date": "2026-03-16", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-03-16. Duration: 50 min. Counties: Frederick, Baltimore, Montgomery, Washington, Carroll, Howard. Storm tags: wind: 60.0, hail: 0.75\", tornado: POSSIBLE. This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #19 (50 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-19" }, { "id": "ww-LWX-SV-W-24-2026-03-16-Montgomery-wind", "zip": "", "city": "", "date": "2026-03-16", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-03-16. Duration: 34 min. Counties: Anne Arundel, Howard, Montgomery, Prince George's. Storm tags: wind: 60.0, hail: 0.75\", tornado: POSSIBLE. This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #24 (34 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-24" }, { "id": "ww-LWX-SV-W-24-2026-03-16-Montgomery-hail", "zip": "", "city": "", "date": "2026-03-16", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-03-16. Duration: 34 min. Counties: Anne Arundel, Howard, Montgomery, Prince George's. Storm tags: wind: 60.0, hail: 0.75\", tornado: POSSIBLE. This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #24 (34 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-24" }, { "id": "ww-LWX-SV-W-22-2026-03-16-Montgomery-wind", "zip": "", "city": "", "date": "2026-03-16", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-03-16. Duration: 36 min. County: Montgomery. Storm tags: wind: 60.0, hail: 0.75\", tornado: POSSIBLE. This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #22 (36 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-22" }, { "id": "ww-LWX-SV-W-22-2026-03-16-Montgomery-hail", "zip": "", "city": "", "date": "2026-03-16", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-03-16. Duration: 36 min. County: Montgomery. Storm tags: wind: 60.0, hail: 0.75\", tornado: POSSIBLE. This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #22 (36 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-22" }, { "id": "ww-LWX-SV-W-16-2026-03-16-Montgomery-wind", "zip": "", "city": "", "date": "2026-03-16", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-03-16. Duration: 48 min. Counties: Frederick, Montgomery, Washington. Storm tags: wind: 70.0, hail: 0.75\", tornado: POSSIBLE. This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #16 (48 min)", "windSpeedMph": 70, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-16" }, { "id": "ww-LWX-SV-W-16-2026-03-16-Montgomery-hail", "zip": "", "city": "", "date": "2026-03-16", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-03-16. Duration: 48 min. Counties: Frederick, Montgomery, Washington. Storm tags: wind: 70.0, hail: 0.75\", tornado: POSSIBLE. This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #16 (48 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-16" }, { "id": "iem-ww-LWX-TO-W-6-Montgomery-tornado-2026-03-16", "zip": "", "city": "Montgomery", "date": "2026-03-16", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "severe", "eventType": "tornado", "confidence": 0.85, "damageTypes": [ "Structural roof failure", "Debris penetration", "Complete shingle removal" ], "description": "TO W for Montgomery.", "sourceDetail": "NWS LWX — TO/W", "evidenceLevel": "warning", "warningProductKey": "LWX-TO-W-6" }, { "id": "iem-ww-LWX-TO-W-7-Montgomery-tornado-2026-03-16", "zip": "", "city": "Montgomery", "date": "2026-03-16", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "severe", "eventType": "tornado", "confidence": 0.85, "damageTypes": [ "Structural roof failure", "Debris penetration", "Complete shingle removal" ], "description": "TO W for Montgomery.", "sourceDetail": "NWS LWX — TO/W", "evidenceLevel": "warning", "warningProductKey": "LWX-TO-W-7" }, { "id": "ncei-1311462-2026-03-11", "lon": 210267, "zip": "", "city": "HYATTSTOWN", "date": "2026-03-11", "county": "Montgomery", "source": "NCEI Storm Events Database", "severity": "moderate", "eventType": "wind", "confidence": 0.95, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Trees blew down blocking MD-355 Frederick Road near Prescott Road.", "sourceDetail": "Verified by Department of Highways — NCEI Event #1311462", "windSpeedMph": 52, "evidenceLevel": "official_backfill" }, { "id": "ncei-1311465-2026-03-11", "lon": 210267, "zip": "", "city": "CLARKSBURG", "date": "2026-03-11", "county": "Montgomery", "source": "NCEI Storm Events Database", "severity": "high", "eventType": "wind", "confidence": 0.95, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Several trees, wires, and large limbs blew down around Clarksburg to Damascus.", "sourceDetail": "Verified by Emergency Manager — NCEI Event #1311465", "windSpeedMph": 61, "evidenceLevel": "official_backfill" }, { "id": "ncei-1311466-2026-03-11", "lon": 210267, "zip": "", "city": "CEDAR GROVE", "date": "2026-03-11", "county": "Montgomery", "source": "NCEI Storm Events Database", "severity": "high", "eventType": "wind", "confidence": 0.95, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Numerous large tree limbs several inches in diameter snapped and blew in from neighbor's yard.", "sourceDetail": "Verified by COOP Observer — NCEI Event #1311466", "windSpeedMph": 61, "evidenceLevel": "official_backfill" }, { "id": "ncei-1311467-2026-03-11", "lon": 210267, "zip": "", "city": "DAMASCUS", "date": "2026-03-11", "county": "Montgomery", "source": "NCEI Storm Events Database", "severity": "high", "eventType": "wind", "confidence": 0.95, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Several shingles and shutters blew off a house just east of downtown Damascus.", "sourceDetail": "Verified by Trained Spotter — NCEI Event #1311467", "windSpeedMph": 65, "evidenceLevel": "official_backfill" }, { "id": "ncei-1311468-2026-03-11", "lon": 210267, "zip": "", "city": "DAVIS ARPT", "date": "2026-03-11", "county": "Montgomery", "source": "NCEI Storm Events Database", "severity": "moderate", "eventType": "wind", "confidence": 0.95, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "A large tree blew down on Hawkins Creamery Road.", "sourceDetail": "Verified by Trained Spotter — NCEI Event #1311468", "windSpeedMph": 52, "evidenceLevel": "official_backfill" }, { "id": "ncei-1311472-2026-03-11", "lon": 210267, "zip": "", "city": "MIDDLEBROOK", "date": "2026-03-11", "county": "Montgomery", "source": "NCEI Storm Events Database", "severity": "moderate", "eventType": "wind", "confidence": 0.95, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Several trees and wires blew down in the Germantown/Gaithersburg area.", "sourceDetail": "Verified by Emergency Manager — NCEI Event #1311472", "windSpeedMph": 52, "evidenceLevel": "official_backfill" }, { "id": "ww-LWX-SV-W-8-2026-03-11-Montgomery-wind", "zip": "", "city": "", "date": "2026-03-11", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-03-11. Duration: 35 min. Counties: Montgomery, Frederick. Storm tags: wind: 70.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #8 (35 min)", "windSpeedMph": 70, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-8" }, { "id": "ww-LWX-SV-W-8-2026-03-11-Montgomery-hail", "zip": "", "city": "", "date": "2026-03-11", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-03-11. Duration: 35 min. Counties: Montgomery, Frederick. Storm tags: wind: 70.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #8 (35 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-8" }, { "id": "ww-LWX-SV-W-9-2026-03-11-Montgomery-wind", "zip": "", "city": "", "date": "2026-03-11", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-03-11. Duration: 34 min. Counties: Howard, Frederick, Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #9 (34 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-9" }, { "id": "ww-LWX-SV-W-9-2026-03-11-Montgomery-hail", "zip": "", "city": "", "date": "2026-03-11", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-03-11. Duration: 34 min. Counties: Howard, Frederick, Montgomery. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #9 (34 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-9" }, { "id": "ww-LWX-SV-W-10-2026-03-11-Montgomery-wind", "zip": "", "city": "", "date": "2026-03-11", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-03-11. Duration: 46 min. Counties: Carroll, Montgomery, Prince George's, Howard, Anne Arundel, Baltimore, Harford. Storm tags: wind: 70.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #10 (46 min)", "windSpeedMph": 70, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-10" }, { "id": "ww-LWX-SV-W-10-2026-03-11-Montgomery-hail", "zip": "", "city": "", "date": "2026-03-11", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2026-03-11. Duration: 46 min. Counties: Carroll, Montgomery, Prince George's, Howard, Anne Arundel, Baltimore, Harford. Storm tags: wind: 70.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #10 (46 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-10" }, { "id": "iem-ww-LWX-TO-W-2-Montgomery-tornado-2026-03-11", "zip": "", "city": "Montgomery", "date": "2026-03-11", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "severe", "eventType": "tornado", "confidence": 0.85, "damageTypes": [ "Structural roof failure", "Debris penetration", "Complete shingle removal" ], "description": "TO W for Montgomery.", "sourceDetail": "NWS LWX — TO/W", "evidenceLevel": "warning", "warningProductKey": "LWX-TO-W-2" }, { "id": "iem-geo-2026-03-11T23:06:00Z-tornado-39.33--77.00", "lat": 39.33, "lon": -77, "zip": "", "city": "2 S Gaither", "date": "2026-03-11", "county": "Howard", "source": "IEM Local Storm Reports", "severity": "high", "eventType": "tornado", "confidence": 92, "damageTypes": [ "Structural roof failure", "Debris penetration", "Complete shingle removal" ], "description": "TORNADO reported near 2 S Gaither, MD. National Weather Service Storm Survey confirms a brief EF-1 tornado occurred in Cooksville, MD from approximately 7:06PM to 7:07PM. Maximum wind is estimated at 90 mph. Path length is 0.4 miles, and a 100 yard max width.", "sourceDetail": "NWS LWX — NWS Storm Survey via Iowa Mesonet (GeoJSON)", "evidenceLevel": "reported" }, { "id": "iem-geo-2026-03-11T23:14:00Z-tornado-39.36--76.89", "lat": 39.36, "lon": -76.89, "zip": "", "city": "1 NE Marriottsville", "date": "2026-03-11", "county": "Carroll", "source": "IEM Local Storm Reports", "severity": "high", "eventType": "tornado", "confidence": 92, "damageTypes": [ "Structural roof failure", "Debris penetration", "Complete shingle removal" ], "description": "TORNADO reported near 1 NE Marriottsville, MD. EF0. Peak Wind 80 mph. Path Width 75 yards. Path length 0.3 miles.", "sourceDetail": "NWS LWX — NWS Storm Survey via Iowa Mesonet (GeoJSON)", "evidenceLevel": "reported" }, { "id": "iem-lsr-2026-02-07-wind-39.38--77.10", "lat": 39.38, "lon": -77.1, "zip": "", "city": "1 N Watersville", "date": "2026-02-07", "county": "Carroll", "source": "IEM Local Storm Reports", "severity": "high", "eventType": "wind", "confidence": 0.92, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "NON-TSTM WND GST reported near 1 N Watersville", "sourceDetail": "NWS LWX — Trained Spotter via Iowa Mesonet", "windSpeedMph": 72, "evidenceLevel": "reported" }, { "id": "iem-202602071450-wind-39.38--77.10", "lat": 39.38, "lon": -77.1, "zip": "", "city": "1 N Watersville", "date": "2026-02-07", "county": "Carroll", "source": "IEM Local Storm Reports", "severity": "severe", "eventType": "wind", "confidence": 92, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "NON-TSTM WND GST reported near 1 N Watersville, MD. Peak gust: 83 mph.", "sourceDetail": "NWS LWX — Trained Spotter via Iowa Mesonet", "windSpeedMph": 83, "evidenceLevel": "reported" }, { "id": "iem-ww-LWX-HW-W-1-Montgomery-wind-2026-02-07", "zip": "", "city": "Montgomery", "date": "2026-02-07", "county": "Montgomery", "source": "IEM High Wind Archive", "severity": "high", "eventType": "wind", "confidence": 0.72, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "HW W for Montgomery.", "sourceDetail": "NWS LWX — HW/W", "evidenceLevel": "warning", "warningProductKey": "LWX-HW-W-1" }, { "id": "fema-3634-Montgomery", "zip": "", "city": "Montgomery", "date": "2026-01-23", "county": "Montgomery", "source": "FEMA Declaration", "severity": "moderate", "eventType": "wind", "confidence": 0.95, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Federal disaster declaration: SEVERE WINTER STORM", "sourceDetail": "FEMA DR-3634: SEVERE WINTER STORM", "evidenceLevel": "official_backfill" }, { "id": "iem-lsr-2025-11-16-wind-39.38--77.10", "lat": 39.38, "lon": -77.1, "zip": "", "city": "1 N Watersville", "date": "2025-11-16", "county": "Carroll", "source": "IEM Local Storm Reports", "severity": "high", "eventType": "wind", "confidence": 0.92, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "Measured on personal weather station", "sourceDetail": "NWS LWX — Trained Spotter via Iowa Mesonet", "windSpeedMph": 61, "evidenceLevel": "reported" }, { "id": "iem-202511161644-wind-39.38--77.10", "lat": 39.38, "lon": -77.1, "zip": "", "city": "1 N Watersville", "date": "2025-11-16", "county": "Carroll", "source": "IEM Local Storm Reports", "severity": "high", "eventType": "wind", "confidence": 92, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "NON-TSTM WND GST reported near 1 N Watersville, MD. Peak gust: 70 mph.", "sourceDetail": "NWS LWX — Trained Spotter via Iowa Mesonet", "windSpeedMph": 70, "evidenceLevel": "reported" }, { "id": "iem-lsr-2025-11-05-wind-39.38--77.10", "lat": 39.38, "lon": -77.1, "zip": "", "city": "1 N Watersville", "date": "2025-11-05", "county": "Carroll", "source": "IEM Local Storm Reports", "severity": "high", "eventType": "wind", "confidence": 0.92, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "A wind gust of 50 knots (58 MPH) was measured by a trained spotter's personal weather station near Mount Airy.", "sourceDetail": "NWS LWX — Trained Spotter via Iowa Mesonet", "windSpeedMph": 58, "evidenceLevel": "reported" }, { "id": "iem-202511060242-wind-39.38--77.10", "lat": 39.38, "lon": -77.1, "zip": "", "city": "1 N Watersville", "date": "2025-11-05", "county": "Carroll", "source": "IEM Local Storm Reports", "severity": "high", "eventType": "wind", "confidence": 92, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Fence/screen damage" ], "description": "TSTM WND GST reported near 1 N Watersville, MD. Peak gust: 67 mph.", "sourceDetail": "NWS LWX — Trained Spotter via Iowa Mesonet", "windSpeedMph": 67, "evidenceLevel": "reported" }, { "id": "ww-LWX-SV-W-374-2025-09-25-Montgomery-wind", "zip": "", "city": "", "date": "2025-09-25", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "wind", "confidence": 70, "damageTypes": [ "Roof shingle lift", "Soffit/fascia damage", "Tree strike risk", "Hurricane wind damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2025-09-25. Duration: 30 min. Counties: Montgomery, Allegany, Washington. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #374 (30 min)", "windSpeedMph": 60, "evidenceLevel": "warning", "warningProductKey": "LWX-SV-W-374" }, { "id": "ww-LWX-SV-W-374-2025-09-25-Montgomery-hail", "zip": "", "city": "", "date": "2025-09-25", "county": "Montgomery", "source": "IEM Watch/Warn Archive", "severity": "high", "eventType": "hail", "confidence": 70, "damageTypes": [ "Shingle bruising", "Granule displacement", "Metal denting", "Vehicle damage" ], "description": "Severe Thunderstorm Warning issued by NWS LWX on 2025-09-25. Duration: 30 min. Counties: Montgomery, Allegany, Washington. Storm tags: wind: 60.0, hail: 0.75\". This is a warning — not a confirmed event.", "sourceDetail": "NWS LWX — Severe Thunderstorm Warning #374 (30 min)", "evidenceLevel": "warning", "hailSizeInches": 0.75, "warningProductKey": "LWX-SV-W-374" } ] }