This alert expired on 9 August 2026 at 00:45 UTC. It is kept here as a record.
It is the 7th strongest of the 30 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 8 at 8:36PM EDT until August 8 at 8:45PM EDT by NWS Wilmington OH
An estimated 1,231,602 people live within 50 km of this point.
Nearby, since 15 March 2026
- August 9, 2026 · score 52 · 4.6 km
- August 8, 2026 · score 52 · 8.4 km
- August 11, 2026 · score 67 · 11.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 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) | 52 / 100 |
| Our confidence | 80% |
| Coordinates | 39.7687, -83.4915 |
| Nearest City | Springfield (32 km) |
| Population Exposed | 1.2M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-09T00:36:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Butler, OH; Warren, OH; Delaware, OH; Fairfield, OH; Franklin, OH; Licking, OH |
| Headline | Severe Thunderstorm Warning issued August 8 at 8:36PM EDT until August 8 at 8:45PM EDT by NWS Wilmington OH |
| Expires | 2026-08-08T20:45:00-04:00 |
| SenderName | NWS Wilmington OH |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.dc5a7fa6de658c6ce85504c2779972770083934d.002.1","noaa_urn:oid:2.49.0.1.840.0.a3f55df4c7d1c14de71d25f05accb8da97a7e2b9.001.1"] |
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 52/100, near Springfield (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.