Right now
The most recent data we hold from NOAA arrived 6 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 30 May 2026 at 23:15 UTC. It is kept here as a record.
It is the 41st strongest of the 97 detections recorded within 20 km of this point since 22 March 2026. The last comparable one was on 26 May 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 30 at 4:38PM MDT until May 30 at 5:15PM MDT by NWS Rapid City SD
Nearby, since 22 March 2026
- May 30, 2026 · score 16 · 16.2 km
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.
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) | 16 / 100 |
| Our confidence | 60% |
| Coordinates | 43.1720, -102.8380 |
| Nearest City | Rapid City (106 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-30T22:38:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.ed2862cdb5c1cf1c1ff27ea86a84b8085f73f011.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Fall River, SD; Oglala Lakota, SD |
| Headline | Severe Thunderstorm Warning issued May 30 at 4:38PM MDT until May 30 at 5:15PM MDT by NWS Rapid City SD |
| Expires | 2026-05-30T17:15:00-06:00 |
| 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 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.
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