This alert expired on 17 March 2026 at 01:15 UTC. It is kept here as a record.
It is the 5th strongest of the 84 detections recorded within 20 km of this point since 17 March 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued March 16 at 8:33PM EDT until March 16 at 9:15PM EDT by NWS Baltimore MD/Washington DC
An estimated 388,981 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 21, 2026 · score 37 · 7.7 km
- May 26, 2026 · score 43 · 9.0 km
- May 25, 2026 · score 43 · 10.1 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 88 % 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 | 88% |
| Coordinates | 37.1543, -77.3308 |
| Nearest City | Petersburg (10 km) |
| Population Exposed | 389.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-17T00:33:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.3000d08216b12e3a71a2185b5e554d07 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | District of Columbia, DC; Anne Arundel, MD; Baltimore, MD; Carroll, MD; Charles, MD; Frederick, MD; Howard, MD; Montgomery, MD; Prince Georges, MD; Arlington, VA; Fairfax, VA; Fauquier, VA; Loudoun, VA; Prince William, VA; Stafford, VA; City of Alexandria, VA; City of Fairfax, VA; City of Falls Church, VA; City of Manassas, VA; City of Manassas Park, VA; Charles, MD; Culpeper, VA; Fauquier, VA; King George, VA; Orange, VA; Prince William, VA; Spotsylvania, VA; Stafford, VA; City of Fredericksburg, VA; Caroline, VA; Charles City, VA; Chesterfield, VA; Dinwiddie, VA; Essex, VA; Goochland, VA; Greensville, VA; Hanover, VA; Henrico, VA; James City, VA; King and Queen, VA; King William, VA; Louisa, VA; New Kent, 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 Richmond, VA; City of Williamsburg, VA and 3 more areas |
| Headline | Severe Thunderstorm Warning issued March 16 at 8:33PM EDT until March 16 at 9:15PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-03-16T21:15:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.3000d08216b12e3a71a2185b5e554d07ec8f75ed.001.1","noaa_urn:oid:2.49.0.1.840.0.fc2949a7985dd192a978d5ba27a75fe727b72e2b.001.1","noaa_urn:oid:2.49.0.1.840.0.554e2e4f0052cbd81d3dc2d7b5b0914165e6959c.001.1","noaa_urn:oid:2.49.0.1.840.0.87e6e3abdcc2c8e7af9bf4b30d914e1e098a152f.002.1","noaa_urn:oid:2.49.0.1.840.0.c4f1424850bdbd706c5f0d89cae436507497be58.001.1","noaa_urn:oid:2.49.0.1.840.0.555d8eeddaff06b0c672c47e64cf9bd77efdcd71.001.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | Amelia Courthouse |
| Spc County | Amelia |
| Spc State | VA |
| Spc Comments | Several reports of trees blocking roadways throughout the county. (AKQ) |
| MergedSources | [{"id":"spc_wind_37.15_-78.13_197","source":"spc","severity":"medium","severityValue":45,"timestamp":1773707744916,"latitude":37.15,"longitude":-78.13},{"id":"spc_wind_37.19_-78.14_198","source":"spc","severity":"medium","severityValue":45,"timestamp":1773707744916,"latitude":37.19,"longitude":-78.14},{"id":"spc_wind_37.34_-77.98_199","source":"spc","severity":"medium","severityValue":45,"timestamp":1773705660000,"latitude":37.34,"longitude":-77.98}] |
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 Petersburg?
Calamity.live data shows a weather event with CalamityScore 43/100, near Petersburg (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 187 scientific monitoring sources.