This alert expired on 1 September 2026 at 22:45 UTC. It is kept here as a record.
No stronger detection stands among the 14 recorded within 20 km of this point since 2 April 2026 — 2 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 1 at 4:30PM MDT until September 1 at 4:45PM MDT by NWS Salt Lake City UT
An estimated 47,468 people live within 50 km of this point.
Nearby, since 2 April 2026
- September 1, 2026 · score 28 · 2.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 28 out of 100, at 80 % 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) | 28 / 100 |
| Our confidence | 80% |
| Coordinates | 42.1742, -114.2669 |
| Nearest City | Twin Falls (46 km) |
| Population Exposed | 47.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-01T22:30:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.1ced9d3fe4b92f0095812b336276d7c3c7873a02.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Box Elder, UT; Jerome, ID; Twin Falls, ID |
| Headline | Severe Thunderstorm Warning issued September 1 at 4:30PM MDT until September 1 at 4:45PM MDT by NWS Salt Lake City UT |
| Expires | 2026-09-01T16:45:00-06:00 |
| SenderName | NWS Salt Lake City UT |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1ced9d3fe4b92f0095812b336276d7c3c7873a02.001.1","noaa_urn:oid:2.49.0.1.840.0.e9dcd92f1570249013783326389114fd2e098a4f.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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 28/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.