This alert expired on 21 May 2026 at 21:02 UTC. It is kept here as a record.
No stronger detection stands among the 36 recorded within 20 km of this point since 16 March 2026 — 21 others scored the same. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 21 at 4:52PM EDT until May 21 at 5:00PM EDT by NWS Blacksburg VA
An estimated 145,329 people live within 50 km of this point.
Nearby, since 16 March 2026
- March 17, 2026 · score 43 · 5.4 km
- June 22, 2026 · score 43 · 17.7 km
- July 19, 2026 · score 43 · 22.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 81 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 81% |
| Coordinates | 37.1050, -78.9267 |
| Nearest City | Lynchburg (39 km) |
| Population Exposed | 145.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-21T20:52:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.4c98bca50af009e6ff338fb0e1563c4fb421750a.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Appomattox, VA; Campbell, VA; Charlotte, VA; Halifax, VA |
| Headline | Severe Thunderstorm Warning issued May 21 at 4:52PM EDT until May 21 at 5:00PM EDT by NWS Blacksburg VA |
| Expires | 2026-05-21T17:02:00-04:00 |
| SenderName | NWS Blacksburg VA |
| HasExactCoords | true |
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 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.