This alert expired on 31 August 2026 at 00:45 UTC. It is kept here as a record.
No stronger detection stands among the 21 recorded within 20 km of this point since 4 April 2026 — 10 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 7:25PM CDT until August 30 at 7:45PM CDT by NWS Bismarck ND
Nearby, since 4 April 2026
- August 30, 2026 · score 22 · 21.9 km
How we know
Confirmed by 4 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 | 46.1254, -100.7171 |
| Nearest City | Bismarck (76 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-31T00:25:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Burleigh, ND; Emmons, ND; Grant, ND; Morton, ND; Oliver, ND; Sioux, ND; Corson, SD |
| Headline | Severe Thunderstorm Warning issued August 30 at 7:25PM CDT until August 30 at 7:45PM CDT by NWS Bismarck ND |
| Expires | 2026-08-30T19:45:00-05:00 |
| SenderName | NWS Bismarck ND |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.84628b235677f713d1db6f9f76551aa9e822aab3.001.1","noaa_urn:oid:2.49.0.1.840.0.713c977a02c4afc580a2d80ef61055edb5bb9dd4.001.1"] |
| Spc ReportType | wind |
| Spc Speed | 62 |
| Spc Location | 1 ESE Lark |
| Spc County | Grant |
| Spc State | ND |
| Spc Comments | NDAWN station Carson 9ENE. Report at 10 meters... 46 MPH reported at the surface. (BIS) |
| Iem TypeSummary | G |
| Iem Magnitude | 60 |
| Iem Unit | MPH |
| Iem City | 3 SE Watauga |
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 Bismarck (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.