This alert expired on 3 June 2026 at 00:15 UTC. It is kept here as a record.
No stronger detection stands among the 126 recorded within 20 km of this point since 15 March 2026 — 22 others scored the same. The last comparable one was on 1 June 2026. 15 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 2 at 5:30PM MDT until June 2 at 6:15PM MDT by NWS Rapid City SD
An estimated 73,569 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 8, 2026 · score 39 · 6.6 km
- July 3, 2026 · score 39 · 14.0 km
- August 10, 2026 · score 39 · 19.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 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) | 39 / 100 |
| Our confidence | 80% |
| Coordinates | 43.9465, -103.5597 |
| Nearest City | Rapid City (30 km) |
| Population Exposed | 73.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-02T23:30:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Crook, WY; Weston, WY; Custer, SD; Oglala Lakota, SD; Pennington, SD |
| Headline | Severe Thunderstorm Warning issued June 2 at 5:30PM MDT until June 2 at 6:15PM MDT by NWS Rapid City SD |
| Expires | 2026-06-02T18:15:00-06:00 |
| SenderName | NWS Rapid City SD |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d937d40c5ed026b7477536478f43c6ede4dfa0d7.001.1","noaa_urn:oid:2.49.0.1.840.0.8745a8b9fbeb9118944d2985e2288741db948525.001.1"] |
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 39/100, near Rapid City (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.