This alert expired on 30 August 2026 at 23:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 33 detections recorded within 20 km of this point since 28 August 2026. The last comparable one was on 29 August 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 30 at 4:23PM MDT until August 30 at 5:00PM MDT by NWS Salt Lake City UT
An estimated 770,712 people live within 50 km of this point.
Nearby, since 28 August 2026
- August 30, 2026 · score 48 · 5.1 km
- August 28, 2026 · score 52 · 23.3 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 | 40.1480, -111.7020 |
| Nearest City | Spanish Fork (6 km) |
| Population Exposed | 770.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-30T22:23:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Utah, UT |
| Headline | Severe Thunderstorm Warning issued August 30 at 4:23PM MDT until August 30 at 5:00PM MDT by NWS Salt Lake City UT |
| Expires | 2026-08-30T17:00:00-06:00 |
| SenderName | NWS Salt Lake City UT |
| 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 Spanish Fork (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.