Right now
The most recent data we hold from NOAA arrived 3 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 2 June 2026 at 06:01 UTC. It is kept here as a record.
No stronger detection stands among the 25 recorded within 20 km of this point since 26 March 2026 — 16 others scored the same. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 1 at 11:51PM MDT until June 2 at 12:00AM MDT by NWS Billings MT
Nearby, since 26 March 2026
- July 3, 2026 · score 22 · 16.8 km
- June 23, 2026 · score 22 · 16.8 km
- June 21, 2026 · score 22 · 16.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 61 % 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) | 22 / 100 |
| Our confidence | 61% |
| Coordinates | 45.3475, -106.2137 |
| Nearest City | Sheridan (84 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-02T05:51:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.322a3ab8cd90c4dacd5b52a4ec6bcca5fe5a5d18.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Powder River, MT |
| Headline | Severe Thunderstorm Warning issued June 1 at 11:51PM MDT until June 2 at 12:00AM MDT by NWS Billings MT |
| Expires | 2026-06-02T00:01:00-06:00 |
| 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 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 in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.