This alert expired on 7 June 2026 at 22:00 UTC. It is kept here as a record.
It is the 4th strongest of the 11 detections recorded within 20 km of this point since 26 March 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 June 7 at 3:31PM MDT until June 7 at 4:00PM MDT by NWS Billings MT
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 | 45.3081, -105.8415 |
| Nearest City | Sheridan (104 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-07T21:31:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Powder River, MT; Big Horn, MT; Powder River, MT; Rosebud, MT; Sheridan, WY |
| Headline | Severe Thunderstorm Warning issued June 7 at 3:31PM MDT until June 7 at 4:00PM MDT by NWS Billings MT |
| Expires | 2026-06-07T16:00:00-06:00 |
| SenderName | NWS Billings MT |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.88eb0affa9a9129e0a6afe83103b918fab478fbc.001.1","noaa_urn:oid:2.49.0.1.840.0.0241628da49baa29c8f2bfcf2d914986644aeea9.001.1"] |
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 16/100, near Sheridan (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.