This alert expired on 29 August 2026 at 23:00 UTC. It is kept here as a record.
It is the 7th strongest of the 28 detections recorded within 20 km of this point since 14 June 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 29 at 3:37PM MST until August 29 at 4:00PM MST by NWS Tucson AZ
An estimated 636,438 people live within 50 km of this point.
Nearby, since 14 June 2026
- July 12, 2026 · score 48 · 5.8 km
- August 10, 2026 · score 48 · 9.3 km
- August 30, 2026 · score 54 · 10.1 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 | 31.8420, -111.1360 |
| Nearest City | Green Valley (14 km) |
| Population Exposed | 636.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-29T22:37:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Pima, AZ |
| Headline | Severe Thunderstorm Warning issued August 29 at 3:37PM MST until August 29 at 4:00PM MST by NWS Tucson AZ |
| Expires | 2026-08-29T16:00:00-07:00 |
| 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 48/100, near Green Valley (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.