This alert expired on 3 September 2026 at 06:45 UTC. It is kept here as a record.
It is the 6th strongest of the 8 detections recorded within 20 km of this point since 14 May 2026. The last comparable one was on 6 July 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 3 at 12:18AM MDT until September 3 at 12:45AM MDT by NWS Glasgow MT
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 16 out of 100, at 67 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. 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 | 67% |
| Coordinates | 47.6788, -105.0337 |
| Nearest City | Williston (118 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-03T06:18:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.e70bf7b12b3f066b7980ae0aecac86a50c5a1697.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Dawson, MT; Garfield, MT; McCone, MT; Prairie, MT; Richland, MT; Roosevelt, MT |
| Headline | Severe Thunderstorm Warning issued September 3 at 12:18AM MDT until September 3 at 12:45AM MDT by NWS Glasgow MT |
| Expires | 2026-09-03T00:45:00-06:00 |
| SenderName | NWS Glasgow MT |
| HasExactCoords | true |
| Spc ReportType | wind |
| Spc Speed | 65 |
| Spc Location | 14 NNE Weldon |
| Spc County | McCone |
| Spc State | MT |
| Spc Comments | Mesonet station VDWM8 Vida W. (GGW) |
| MergedSources | [{"id":"spc_wind_47.80_-105.79_292","source":"spc","severity":"medium","severityValue":45,"timestamp":1788409800000,"latitude":47.8,"longitude":-105.79}] |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 16/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.