This alert expired on 8 August 2026 at 05:00 UTC. It is kept here as a record.
It is the 3rd strongest of the 36 detections recorded within 20 km of this point since 15 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 8 at 12:32AM EDT until August 8 at 1:00AM EDT by NWS Wilmington OH
An estimated 593,067 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 5, 2026 · score 48 · 9.2 km
- May 27, 2026 · score 48 · 12.1 km
- May 19, 2026 · score 43 · 15.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 48 out of 100, at 81 % 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) | 48 / 100 |
| Our confidence | 81% |
| Coordinates | 39.7800, -84.6417 |
| Nearest City | Richmond (22 km) |
| Population Exposed | 593.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-08T04:32:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.ecd729ff26c992d53410c7208ee7a9f9b6f98a7b.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Preble, OH |
| Headline | Severe Thunderstorm Warning issued August 8 at 12:32AM EDT until August 8 at 1:00AM EDT by NWS Wilmington OH |
| Expires | 2026-08-08T01:00:00-04:00 |
| SenderName | NWS Wilmington OH |
| 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 48/100, near Richmond (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.