Right now
The most recent data we hold from NOAA arrived 66 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 20 June 2026 at 23:19 UTC. It is kept here as a record.
No stronger detection stands among the 18 recorded within 20 km of this point since 11 April 2026 — 9 others scored the same. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 20 at 5:10PM MDT until June 20 at 5:15PM MDT by NWS Salt Lake City UT
An estimated 279,984 people live within 50 km of this point.
Nearby, since 11 April 2026
- June 25, 2026 · score 43 · 13.3 km
- August 29, 2026 · score 43 · 19.5 km
- July 30, 2026 · score 43 · 20.3 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 79 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 79% |
| Coordinates | 41.5010, -111.8010 |
| Nearest City | Brigham City (18 km) |
| Population Exposed | 280.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-20T23:10:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.ee43af7c7f79f3ab26199a6960e3cb5e |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Box Elder, UT; Cache, UT; Weber, UT; Box Elder, UT; Cache, UT; Rich, UT; Weber, UT |
| Headline | Severe Thunderstorm Warning issued June 20 at 5:10PM MDT until June 20 at 5:15PM MDT by NWS Salt Lake City UT |
| Expires | 2026-06-20T17:19:00-06:00 |
| SenderName | NWS Salt Lake City UT |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ee43af7c7f79f3ab26199a6960e3cb5e94d3f59e.001.1","noaa_urn:oid:2.49.0.1.840.0.fd23904f6415dbf46f888d3abe32c4faf35766f6.001.1"] |
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 8 March 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 near Brigham City?
Calamity.live data shows a weather event with CalamityScore 43/100, near Brigham City (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.