This alert expired on 14 May 2026 at 03:00 UTC. It is kept here as a record.
No stronger detection stands among the 16 recorded within 20 km of this point since 15 March 2026 — 9 others scored the same. The last comparable one was on 13 May 2026. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued May 13 at 7:47PM MDT until May 13 at 8:00PM MDT by NWS Salt Lake City UT
How we know
Confirmed by 6 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 | 39.3000, -111.1000 |
| Nearest City | Payson (98 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-14T01:47:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Box Elder, UT; Cache, UT; Davis, UT; Duchesne, UT; Juab, UT; Morgan, UT; Rich, UT; Salt Lake, UT; Summit, UT; Tooele, UT; Utah, UT; Wasatch, UT; Weber, UT; Uinta, WY; Daggett, UT; Uintah, UT |
| Headline | Severe Thunderstorm Watch issued May 13 at 7:47PM MDT until May 13 at 8:00PM MDT by NWS Salt Lake City UT |
| Expires | 2026-05-13T21:00:00-06:00 |
| SenderName | NWS Salt Lake City UT |
| HasExactCoords | false |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f26844a17b503e3ba21a3b4e7b7d3f95a593d1c9.001.1","noaa_urn:oid:2.49.0.1.840.0.e9bbf267ef323cb1359aaa93f53a6d3be4a4c53b.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 59 |
| Iem Unit | MPH |
| Iem City | 8 WNW Manti |
| Iem County | Sanpete |
| Iem State | UT |
| Iem Wfo | SLC |
| Iem Remark | Mesonet station PC295 Gunnison Ridge. |
| MergedSources | [{"id":"iem_G_39.490_-111.840_1778713800000","source":"iem","severity":"low","severityValue":25,"timestamp":1778713800000,"latitude":39.49,"longitude":-111.84},{"id":"iem_G_39.650_-111.130_1778709000000","source":"iem","severity":"low","severityValue":25,"timestamp":1778709000000,"latitude":39.65,"longitude":-111.13},{"id":"iem_G_39.310_-110.980_1778707200000","source":"iem","severity":"low","severityValue":25,"timestamp":1778707200000,"latitude":39.31,"longitude":-110.98},{"id":"iem_G_39.320_-111.770_1778710800000","source":"iem","severity":"low","severityValue":25,"timestamp":1778710800000,"latitude":39.32,"longitude":-111.77},{"id":"iem_G_39.320_-111.770_1778711400000","source":"iem","severity":"low","severityValue":25,"timestamp":1778711400000,"latitude":39.32,"longitude":-111.77}] |
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 188 scientific monitoring sources.