This alert expired on 10 August 2026 at 04:30 UTC. It is kept here as a record.
It is the 23rd strongest of the 115 detections recorded within 20 km of this point since 11 March 2026. The last comparable one was on 21 July 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 9 at 11:57PM EDT until August 10 at 12:30AM EDT by NWS Charleston WV
An estimated 90,308 people live within 50 km of this point.
Nearby, since 11 March 2026
- May 24, 2026 · score 43 · 10.5 km
- August 11, 2026 · score 43 · 13.0 km
- May 27, 2026 · score 43 · 15.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 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) | 39 / 100 |
| Our confidence | 80% |
| Coordinates | 39.6100, -82.2457 |
| Nearest City | Lancaster (32 km) |
| Population Exposed | 90.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-10T03:57:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Perry, OH |
| Headline | Severe Thunderstorm Warning issued August 9 at 11:57PM EDT until August 10 at 12:30AM EDT by NWS Charleston WV |
| Expires | 2026-08-10T00:30:00-04:00 |
| SenderName | NWS Charleston WV |
| 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 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 39/100, near Lancaster (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.