This alert expired on 10 August 2026 at 19:45 UTC. It is kept here as a record.
It is the 76th strongest of the 153 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 Warning issued August 10 at 3:39PM EDT until August 10 at 3:45PM EDT by NWS Charleston WV
An estimated 335,037 people live within 50 km of this point.
Nearby, since 17 March 2026
- June 11, 2026 · score 37 · 4.7 km
- July 18, 2026 · score 43 · 6.5 km
- July 21, 2026 · score 41 · 10.4 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.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 80% |
| Coordinates | 39.2691, -77.8473 |
| Nearest City | Martinsburg (23 km) |
| Population Exposed | 335.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-10T19:39:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.1d897ee1ad1d92f4c0a1635626fe41cf |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Fayette, WV; Raleigh, WV; Alleghany, VA; Bath, VA; Rockbridge, VA; City of Covington, VA; Greenbrier, WV; Monroe, WV; Summers, WV; Augusta, VA; Highland, VA; Rockingham, VA; City of Harrisonburg, VA; Grant, WV; Hardy, WV; Pendleton, WV and 11 more areas |
| Headline | Severe Thunderstorm Warning issued August 10 at 3:39PM EDT until August 10 at 3:45PM EDT by NWS Charleston WV |
| Expires | 2026-08-10T15:45:00-04:00 |
| SenderName | NWS Charleston WV |
| HasExactCoords | true |
| MergedCount | 14 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1d897ee1ad1d92f4c0a1635626fe41cf20f53e3f.002.1","noaa_urn:oid:2.49.0.1.840.0.1f5866762d93771c7a1ae39a227f0410da1cbb08.001.1","noaa_urn:oid:2.49.0.1.840.0.ee4ef18b07844992034cb732bb486c2dd75f35b7.001.1","noaa_urn:oid:2.49.0.1.840.0.bdb06e5475552852bee082a11c71b38447765d40.001.1","noaa_urn:oid:2.49.0.1.840.0.b8b02f84d203d83f87bda6680626243344cc00ab.001.1","noaa_urn:oid:2.49.0.1.840.0.b29d06ff06b8c42d14992d71331f095c4a99f3a0.001.1","noaa_urn:oid:2.49.0.1.840.0.66fb1015230fe695d21139bcd74f3ad319a8f064.001.1","noaa_urn:oid:2.49.0.1.840.0.92a79e55f3150d7d1e7dbe71acf65a1038afe868.002.1","noaa_urn:oid:2.49.0.1.840.0.7637e951e88b96239feccfe38758355e9dedc968.001.1","noaa_urn:oid:2.49.0.1.840.0.abe4b40a0fc5a97bbf743f8ff1c83c15eb0c45c7.001.1","noaa_urn:oid:2.49.0.1.840.0.6eef5186c95c28fcd0e0338ecfee7fc918822ac4.001.1","noaa_urn:oid:2.49.0.1.840.0.de3b062abfc9770e37e82693647ecbd766a25b57.001.1","noaa_urn:oid:2.49.0.1.840.0.42039754fc98117a3982e1ddf42a73125573082a.001.1","noaa_urn:oid:2.49.0.1.840.0.c70e451e80fa99b5d783fb8b07b52d9f0588674c.001.1"] |
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.
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 188 scientific monitoring sources.