This alert expired on 8 July 2026 at 22:30 UTC. It is kept here as a record.
No stronger detection stands among the 188 recorded within 20 km of this point since 15 March 2026 — 30 others scored the same. Another comparable one was recorded here earlier the same day. 31 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 8 at 3:48PM MDT until July 8 at 4:30PM MDT by NWS Rapid City SD
An estimated 73,569 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 2, 2026 · score 39 · 6.6 km
- August 10, 2026 · score 39 · 13.1 km
- July 3, 2026 · score 39 · 15.1 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 | 43.9457, -103.4771 |
| Nearest City | Rapid City (25 km) |
| Population Exposed | 73.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-08T21:48:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Pennington, SD |
| Headline | Severe Thunderstorm Warning issued July 8 at 3:48PM MDT until July 8 at 4:30PM MDT by NWS Rapid City SD |
| Expires | 2026-07-08T16:30:00-06:00 |
| SenderName | NWS Rapid City SD |
| 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 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.