This alert expired on 5 July 2026 at 02:00 UTC. It is kept here as a record.
It is the 4th strongest of the 205 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued July 4 at 8:39PM EDT until July 4 at 10:00PM EDT by NWS Wakefield VA
An estimated 267,129 people live within 50 km of this point.
Nearby, since 17 March 2026
- May 27, 2026 · score 43 · 2.1 km
- August 10, 2026 · score 43 · 14.2 km
- May 20, 2026 · score 43 · 14.6 km
How we know
Confirmed by 12 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 90 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 90% |
| Coordinates | 39.2600, -75.5200 |
| Nearest City | Dover (11 km) |
| Population Exposed | 267.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-05T00:39:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.fb2dd467cd5cb756d3cd2c82d0751b59 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Dorchester, MD; Somerset, MD; Wicomico, MD; Worcester, MD; Brunswick, VA; Caroline, VA; Charles City, VA; Chesterfield, VA; Dinwiddie, VA; Essex, VA; Gloucester, VA; Greensville, VA; Hanover, VA; Henrico, VA; James City, VA; King and Queen, VA; King William, VA; Lancaster, VA; Mathews, VA; Middlesex, VA; New Kent, VA; Northumberland, VA; Prince George, VA; Richmond, VA; Surry, VA; Sussex, VA; Westmoreland, VA; York, VA; City of Colonial Heights, VA; City of Emporia, VA; City of Hopewell, VA; City of Petersburg, VA; City of Poquoson, VA; City of Richmond, VA; City of Williamsburg, VA; Chesapeake Bay from Smith Point to Windmill Point VA; Rappahannock River from Urbanna to Windmill Point; York River; James River from Jamestown to the James River Bridge; Coastal waters from Fenwick Island DE to Chincoteague VA out 20 NM; Bergen, NJ; Essex, NJ; Hudson, NJ; Passaic, NJ; Union, NJ; Bronx, NY; Kings, NY; New York, NY; Orange, NY; Putnam, NY; Queens, NY; Richmond, NY; Rockland, NY; Westchester, NY and 2 more areas |
| Headline | Severe Thunderstorm Watch issued July 4 at 8:39PM EDT until July 4 at 10:00PM EDT by NWS Wakefield VA |
| Expires | 2026-07-04T22:00:00-04:00 |
| SenderName | NWS Wakefield VA |
| HasExactCoords | false |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.fb2dd467cd5cb756d3cd2c82d0751b59b36213a6.002.1","noaa_urn:oid:2.49.0.1.840.0.fb2dd467cd5cb756d3cd2c82d0751b59b36213a6.003.1","noaa_urn:oid:2.49.0.1.840.0.974e011e43064ff856343b01691ad6a5ef024d27.003.1","noaa_urn:oid:2.49.0.1.840.0.eeb12aa6f8383a9df0dd3e74cbd1263285ed4d52.002.1","noaa_urn:oid:2.49.0.1.840.0.eeb12aa6f8383a9df0dd3e74cbd1263285ed4d52.001.1"] |
| Iem TypeSummary | D |
| Iem City | Havre De Grace |
| Iem County | Harford |
| Iem State | MD |
| Iem Wfo | LWX |
| Iem Remark | Three trees into houses in Havre De Grace. |
| MergedSources | [{"id":"iem_G_39.440_-75.660_1783211820000","source":"iem","severity":"low","severityValue":25,"timestamp":1783211820000,"latitude":39.44,"longitude":-75.66},{"id":"iem_G_39.480_-75.540_1783212600000","source":"iem","severity":"low","severityValue":25,"timestamp":1783212600000,"latitude":39.48,"longitude":-75.54},{"id":"iem_M_39.120_-75.390_1783212960000","source":"iem","severity":"low","severityValue":25,"timestamp":1783212960000,"latitude":39.12,"longitude":-75.39},{"id":"iem_D_39.300_-75.610_1783212300000","source":"iem","severity":"low","severityValue":25,"timestamp":1783212300000,"latitude":39.3,"longitude":-75.61},{"id":"iem_G_39.360_-75.880_1783210740000","source":"iem","severity":"low","severityValue":25,"timestamp":1783210740000,"latitude":39.36,"longitude":-75.88},{"id":"iem_D_39.350_-75.650_1783212000000","source":"iem","severity":"low","severityValue":25,"timestamp":1783212000000,"latitude":39.35,"longitude":-75.65},{"id":"iem_M_39.520_-75.540_1783212300000","source":"iem","severity":"low","severityValue":25,"timestamp":1783212300000,"latitude":39.52,"longitude":-75.54},{"id":"iem_M_39.660_-75.550_1783212300000","source":"iem","severity":"low","severityValue":25,"timestamp":1783212300000,"latitude":39.66,"longitude":-75.55},{"id":"iem_G_39.860_-75.840_1783210800000","source":"iem","severity":"low","severityValue":25,"timestamp":1783210800000,"latitude":39.86,"longitude":-75.84},{"id":"iem_G_39.240_-75.180_1783215000000","source":"iem","severity":"low","severityValue":25,"timestamp":1783215000000,"latitude":39.24,"longitude":-75.18},{"id":"iem_D_39.550_-76.100_1783210860000","source":"iem","severity":"low","severityValue":25,"timestamp":1783210860000,"latitude":39.55,"longitude":-76.1}] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 10 February 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Want to know when something happens near Dover?
Calamity.live data shows a weather event with CalamityScore 43/100, near Dover (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.