This alert expired on 5 September 2026 at 01:00 UTC. It is kept here as a record.
It is the 64th strongest of the 152 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued September 4 at 6:31PM EDT until September 4 at 9:00PM EDT by NWS Baltimore MD/Washington DC
An estimated 145,329 people live within 50 km of this point.
Nearby, since 16 March 2026
- September 4, 2026 · score 37 · 0.0 km
- September 2, 2026 · score 37 · 0.0 km
- August 11, 2026 · score 43 · 0.0 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 37 out of 100, at 90 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 37 / 100 |
| Our confidence | 90% |
| Coordinates | 37.4000, -78.7000 |
| Nearest City | Lynchburg (39 km) |
| Population Exposed | 145.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-04T22:31:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.43addbcbab131e1dcc2bd5f5d9a3dc109d994cc8.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Nelson, VA; Amelia, VA; Brunswick, VA; Caroline, VA; Charles City, VA; Chesterfield, VA; Cumberland, VA; Dinwiddie, VA; Essex, VA; Fluvanna, VA; Gloucester, VA; Goochland, VA; Greensville, VA; Hanover, VA; Henrico, VA; Isle of Wight, VA; James City, VA; King and Queen, VA; King William, VA; Lancaster, VA; Louisa, VA; Lunenburg, VA; Mathews, VA; Mecklenburg, VA; Middlesex, VA; New Kent, VA; Northumberland, VA; Nottoway, VA; Powhatan, VA; Prince Edward, VA; Prince George, VA; Richmond, VA; Southampton, VA; Surry, VA; Sussex, VA; Westmoreland, VA; York, VA; City of Chesapeake, VA; City of Colonial Heights, VA; City of Emporia, VA; City of Franklin, VA; City of Hampton, VA; City of Hopewell, VA; City of Newport News, VA; City of Norfolk, VA; City of Petersburg, VA; City of Poquoson, VA; City of Portsmouth, VA; City of Richmond, VA; City of Suffolk, VA; City of Virginia Beach, VA; City of Williamsburg, VA; Alleghany, VA; Amherst, VA; Appomattox, VA; Bath, VA; Bedford, VA; Bland, VA; Botetourt, VA; Buckingham, VA; Campbell, VA; Carroll, VA; Charlotte, VA; Craig, VA; Floyd, VA; Franklin, VA; Giles, VA; Grayson, VA; Halifax, VA; Henry, VA; Montgomery, VA; Patrick, VA; Pittsylvania, VA; Pulaski, VA; Roanoke, VA; Rockbridge, VA; Smyth, VA; Tazewell, VA; Wythe, VA; City of Buena Vista, VA; City of Covington, VA; City of Danville, VA; City of Galax, VA; City of Lexington, VA; City of Lynchburg, VA; City of Martinsville, VA; City of Radford, VA; City of Roanoke, VA; City of Salem, VA; Greenbrier, WV; Mercer, WV; Monroe, WV; Summers, WV |
| Headline | Severe Thunderstorm Watch issued September 4 at 6:31PM EDT until September 4 at 9:00PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-09-04T21:00:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | false |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.43addbcbab131e1dcc2bd5f5d9a3dc109d994cc8.002.1","noaa_urn:oid:2.49.0.1.840.0.4129d567bd300639ffa30911654ce7a3444c1e2a.003.1","noaa_urn:oid:2.49.0.1.840.0.0e8a9f47d80e08bbe2434970c68fab72cc8be961.002.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 4 NE Moran |
| Spc County | Nottoway |
| Spc State | VA |
| Spc Comments | Tree down blocking the roadway at the intersection of Holly Farms Road and Morissetts Mill Road. (AKQ) |
| Iem TypeSummary | D |
| Iem City | Elon |
| Iem County | Amherst |
| Iem State | VA |
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 8 March 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 in this area?
Calamity.live data shows a weather event with CalamityScore 37/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.