This alert expired on 30 August 2026 at 00:15 UTC. It is kept here as a record.
It is the 9th strongest of the 34 detections recorded within 20 km of this point since 30 May 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 29 at 5:25PM MDT until August 29 at 6:15PM MDT by NWS Rapid City SD
How we know
Confirmed by 16 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 70 % 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) | 22 / 100 |
| Our confidence | 70% |
| Coordinates | 43.2300, -102.5738 |
| Nearest City | Rapid City (108 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-29T23:25:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Bennett, SD; Jackson, SD; Oglala Lakota, SD; Oglala Lakota, SD |
| Headline | Severe Thunderstorm Warning issued August 29 at 5:25PM MDT until August 29 at 6:15PM MDT by NWS Rapid City SD |
| Expires | 2026-08-29T18:15:00-06:00 |
| SenderName | NWS Rapid City SD |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ea3f11f99a87310084a1a38b31c623c2c4cee667.001.1","noaa_urn:oid:2.49.0.1.840.0.dd84d533dc8ca02503f656e467321e4b70c825b0.002.1"] |
| Spc ReportType | wind |
| Spc Speed | 58 |
| Spc Location | 13 W Oglala |
| Spc County | Oglala Lakota |
| Spc State | SD |
| Spc Comments | (UNR) |
| Iem TypeSummary | G |
| Iem Magnitude | 55 |
| Iem Unit | mph |
| Iem City | 3 ESE Pine Ridge |
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 22/100, near Rapid City (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.