Reported by SPC yesterday.
It is the 16th strongest of the 44 detections recorded within 20 km of this point since 28 August 2026. Another comparable one was recorded here earlier the same day.
What the source measured
SPC reported: Wind UNK kt near 1 NNW Payson, Utah, UT. Social media video of a semi truck rolled over off the side of I-15 from thunderstorm wind gusts. Time estimated from radar. (SLC)
An estimated 494,980 people live within 50 km of this point.
Nearby, since 28 August 2026
- August 30, 2026 · score 48 · 11.4 km
- August 29, 2026 · score 49 · 13.6 km
- August 28, 2026 · score 49 · 13.6 km
How we know
One source: SPC. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 61 % 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 | 61% |
| Coordinates | 40.0500, -111.7400 |
| Nearest City | Payson (1 km) |
| Population Exposed | 495.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-29T12:11:12.020Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | UNK |
| Location | 1 NNW Payson |
| County | Utah |
| State | UT |
| Comments | Social media video of a semi truck rolled over off the side of I-15 from thunderstorm wind gusts. Time estimated from radar. (SLC) |
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 Payson (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.