This alert expired on 31 August 2026 at 05:30 UTC. It is kept here as a record.
It is the 12th strongest of the 85 detections recorded within 20 km of this point since 24 June 2026. The last comparable one was on 27 August 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 30 at 9:39PM MST until August 30 at 10:30PM MST by NWS Tucson AZ
An estimated 43,355 people live within 50 km of this point.
Nearby, since 24 June 2026
- July 17, 2026 · score 39 · 9.2 km
- June 26, 2026 · score 34 · 13.5 km
- June 25, 2026 · score 34 · 16.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 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) | 34 / 100 |
| Our confidence | 81% |
| Coordinates | 31.8433, -110.3500 |
| Nearest City | Sierra Vista (33 km) |
| Population Exposed | 43.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-31T04:39:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cochise, AZ; Pima, AZ |
| Headline | Severe Thunderstorm Warning issued August 30 at 9:39PM MST until August 30 at 10:30PM MST by NWS Tucson AZ |
| Expires | 2026-08-30T22:30:00-07:00 |
| SenderName | NWS Tucson AZ |
| 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 34/100, near Sierra Vista (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.