This alert expired on 30 August 2026 at 23:30 UTC. It is kept here as a record.
No stronger detection stands among the 12 recorded within 20 km of this point since 15 March 2026 — 7 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 30 at 4:47PM MDT until August 30 at 5:30PM MDT by NWS Rapid City SD
An estimated 23,765 people live within 50 km of this point.
Nearby, since 15 March 2026
- August 30, 2026 · score 34 · 4.5 km
- August 11, 2026 · score 34 · 16.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 out of 100, at 81 % 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) | 34 / 100 |
| Our confidence | 81% |
| Coordinates | 46.7619, -102.4080 |
| Nearest City | Dickinson (32 km) |
| Population Exposed | 23.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-30T22:47:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Butte, SD; Meade, SD; Perkins, SD; Ziebach, SD; Perkins, SD; Adams, ND; Bowman, ND; Hettinger, ND and 4 more areas |
| Headline | Severe Thunderstorm Warning issued August 30 at 4:47PM MDT until August 30 at 5:30PM MDT by NWS Rapid City SD |
| Expires | 2026-08-30T17:30:00-06:00 |
| SenderName | NWS Rapid City SD |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.806d74b37550fcd714766cea818dde805ae3a806.002.1","noaa_urn:oid:2.49.0.1.840.0.e72261f2838be027a2367114989301aed75652da.001.1","noaa_urn:oid:2.49.0.1.840.0.9042858c89f6d0496d155a3fc9c5b37f2ab3e45d.001.1","noaa_urn:oid:2.49.0.1.840.0.6940e57db13c2ed91eba4fd74ea42049bf953d1a.001.1","noaa_urn:oid:2.49.0.1.840.0.2e8aad941ea563bbd0e5644d3ed45753fcbb64ed.001.1","noaa_urn:oid:2.49.0.1.840.0.e0c34ddb183c528742a7423378b7cad850300275.001.1","noaa_urn:oid:2.49.0.1.840.0.eee0a54c751e9e7cf656192a2a3f08dd3cc11830.001.1"] |
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 34/100, near Dickinson (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.