Right now
The most recent data we hold from NOAA arrived 4 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 13 May 2026 at 23:00 UTC. It is kept here as a record.
It is the 84th strongest of the 193 detections recorded within 20 km of this point since 13 May 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 13 at 6:37PM EDT until May 13 at 7:00PM EDT by NWS Baltimore MD/Washington DC
An estimated 154,899 people live within 50 km of this point.
Nearby, since 13 May 2026
- May 13, 2026 · score 43 · 1.8 km
- May 18, 2026 · score 43 · 3.8 km
- August 27, 2026 · score 49 · 9.0 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 80 % 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 | 80% |
| Coordinates | 39.3880, -78.0060 |
| Nearest City | Martinsburg (9 km) |
| Population Exposed | 154.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-13T22:37:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.f0ddf3daa09a46ecf29ed09659c1e68995200469.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Clarke, VA; Frederick, VA; City of Winchester, VA; Berkeley, WV; Hampshire, WV; Jefferson, WV; Morgan, WV |
| Headline | Severe Thunderstorm Warning issued May 13 at 6:37PM EDT until May 13 at 7:00PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-05-13T19:00:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| 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 near Martinsburg?
Calamity.live data shows a weather event with CalamityScore 43/100, near Martinsburg (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.