This alert expired on 10 May 2026 at 09:30 UTC. It is kept here as a record.
It is the 4th strongest of the 43 detections recorded within 20 km of this point since 10 March 2026. The last comparable one was on 8 May 2026. 15 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 10 at 3:39AM CDT until May 10 at 4:30AM CDT by NWS Norman OK
An estimated 1,139,605 people live within 50 km of this point.
Nearby, since 10 March 2026
- May 10, 2026 · score 52 · 10.3 km
- June 23, 2026 · score 52 · 11.3 km
- March 10, 2026 · score 76 · 11.8 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 | 35.2764, -97.6982 |
| Nearest City | Mustang (12 km) |
| Population Exposed | 1.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-10T08:39:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cleveland, OK; Grady, OK; McClain, OK |
| Headline | Severe Thunderstorm Warning issued May 10 at 3:39AM CDT until May 10 at 4:30AM CDT by NWS Norman OK |
| Expires | 2026-05-10T04:30:00-05:00 |
| SenderName | NWS Norman OK |
| 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 52/100, near Mustang (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.