This alert expired on 31 August 2026 at 00:45 UTC. It is kept here as a record.
It is the 5th strongest of the 20 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 12 August 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 30 at 6:55PM CDT until August 30 at 7:45PM CDT by NWS Bismarck ND
Nearby, since 15 March 2026
- August 30, 2026 · score 22 · 0.0 km
- July 9, 2026 · score 22 · 17.2 km
How we know
Confirmed by 6 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 | 46.2628, -100.9203 |
| Nearest City | Bismarck (62 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-30T23:55:00.000Z |
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 6:55PM 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.e95e4b917ad486ddd4a156a87296f880dba45422.001.1","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 | 57 |
| Iem Unit | MPH |
| Iem City | 15 SSW Leith |
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.