This alert is in force until 3 September 2026, 02:00 UTC.
It is the 68th strongest of the 72 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 30 August 2026.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued September 2 at 1:36PM MDT until September 2 at 8:00PM MDT by NWS Great Falls MT
Nearby, since 17 March 2026
- August 30, 2026 · score 22 · 0.0 km
- July 26, 2026 · score 22 · 0.0 km
- July 25, 2026 · score 22 · 0.0 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 16 out of 100, at 65 % 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 | 65% |
| Coordinates | 46.8000, -110.4000 |
| Nearest City | Great Falls (103 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-02T19:36:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.569f60b20fa28636685cbb22485b4091ac8575a6.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Blaine, MT; Broadwater, MT; Cascade, MT; Chouteau, MT; Fergus, MT; Glacier, MT; Hill, MT; Jefferson, MT; Judith Basin, MT; Lewis and Clark, MT; Liberty, MT; Meagher, MT; Pondera, MT; Teton, MT; Toole, MT |
| Headline | Severe Thunderstorm Watch issued September 2 at 1:36PM MDT until September 2 at 8:00PM MDT by NWS Great Falls MT |
| Expires | 2026-09-02T20:00:00-06:00 |
| SenderName | NWS Great Falls MT |
| HasExactCoords | false |
| Spc ReportType | wind |
| Spc Speed | 62 |
| Spc Location | 2 SSE Geyser |
| Spc County | Judith Basin |
| Spc State | MT |
| Spc Comments | Mesonet station MTGYS Geyser (MT DOT). (TFX) |
| MergedSources | [{"id":"spc_wind_47.25_-110.48_136","source":"spc","severity":"medium","severityValue":45,"timestamp":1788388200000,"latitude":47.25,"longitude":-110.48}] |
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.