This alert expired on 30 May 2026 at 21:22 UTC. It is kept here as a record.
It is the 12th strongest of the 21 detections recorded within 20 km of this point since 3 April 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 30 at 3:12PM MDT until May 30 at 3:15PM MDT by NWS Billings MT
Nearby, since 3 April 2026
- July 19, 2026 · score 22 · 14.5 km
- August 30, 2026 · score 22 · 16.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 16 out of 100, at 60 % 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) | 16 / 100 |
| Our confidence | 60% |
| Coordinates | 45.0460, -104.4200 |
| Nearest City | Gillette (120 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-30T21:12:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Carter, MT |
| Headline | Severe Thunderstorm Warning issued May 30 at 3:12PM MDT until May 30 at 3:15PM MDT by NWS Billings MT |
| Expires | 2026-05-30T15:22:00-06:00 |
| SenderName | NWS Billings MT |
| HasExactCoords | true |
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 16/100, near Gillette (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.