This alert expired on 29 August 2026 at 23:32 UTC. It is kept here as a record.
Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 29 at 5:22PM MDT until August 29 at 5:30PM MDT by NWS Salt Lake City UT
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 71 % 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) | 22 / 100 |
| Our confidence | 71% |
| Coordinates | 39.5680, -112.1760 |
| Nearest City | Payson (65 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-29T23:22:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Juab, UT; Millard, UT |
| Headline | Severe Thunderstorm Warning issued August 29 at 5:22PM MDT until August 29 at 5:30PM MDT by NWS Salt Lake City UT |
| Expires | 2026-08-29T17:32:00-06:00 |
| SenderName | NWS Salt Lake City UT |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 60 |
| Iem Unit | MPH |
| Iem City | 1 SSE Sugarville |
| Iem County | Millard |
| Iem State | UT |
| Iem Wfo | SLC |
| Iem Remark | Measured at the Sutherland - Agrimet SUTU site. |
| MergedSources | [{"id":"iem_G_39.450_-112.640_1788042600000","source":"iem","severity":"low","severityValue":25,"timestamp":1788042600000,"latitude":39.45,"longitude":-112.64},{"id":"iem_G_39.450_-112.640_1788039000000","source":"iem","severity":"low","severityValue":25,"timestamp":1788039000000,"latitude":39.45,"longitude":-112.64}] |
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 22/100, near Payson (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.