This alert expired on 13 May 2026 at 20:15 UTC. It is kept here as a record.
It is the 2nd strongest of the 16 detections recorded within 20 km of this point since 11 April 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 13 at 2:05PM MDT until May 13 at 2:15PM MDT by NWS Salt Lake City UT
An estimated 473,423 people live within 50 km of this point.
Nearby, since 11 April 2026
- July 29, 2026 · score 39 · 14.1 km
- May 13, 2026 · score 39 · 19.1 km
- July 30, 2026 · score 49 · 20.5 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 78 % 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 | 78% |
| Coordinates | 40.9025, -112.4875 |
| Nearest City | Magna (39 km) |
| Population Exposed | 473.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-13T20:05:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.86f24303705dd35a347e85bfb409d302 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Davis, UT; Salt Lake, UT; Box Elder, UT; Tooele, UT |
| Headline | Severe Thunderstorm Warning issued May 13 at 2:05PM MDT until May 13 at 2:15PM MDT by NWS Salt Lake City UT |
| Expires | 2026-05-13T14:15:00-06:00 |
| SenderName | NWS Salt Lake City UT |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.86f24303705dd35a347e85bfb409d3020c4d2af5.001.1","noaa_urn:oid:2.49.0.1.840.0.dd3bb0079758e7cd834d72c7c8928d8f45f31cff.001.1"] |
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 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.