This alert expired on 31 August 2026 at 04:45 UTC. It is kept here as a record.
It is the 3rd strongest of the 12 detections recorded within 20 km of this point since 9 August 2026. The last comparable one was on 13 August 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 30 at 9:00PM MST until August 30 at 9:45PM MST by NWS Phoenix AZ
An estimated 201,618 people live within 50 km of this point.
Nearby, since 9 August 2026
- August 9, 2026 · score 34 · 7.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 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) | 43 / 100 |
| Our confidence | 81% |
| Coordinates | 33.8686, -112.7086 |
| Nearest City | Sun City West (41 km) |
| Population Exposed | 201.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-31T04:00:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Maricopa, AZ |
| Headline | Severe Thunderstorm Warning issued August 30 at 9:00PM MST until August 30 at 9:45PM MST by NWS Phoenix AZ |
| Expires | 2026-08-30T21:45:00-07:00 |
| SenderName | NWS Phoenix 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 43/100, near Sun City West (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.