Reported by SPC today.
It is the 3rd strongest of the 91 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day.
What the source measured
SPC reported: Wind 59 kt near 11 SSE Ulm, Cascade, MT. 59 mph thunderstorm wind gust. Time estimated. (TFX)
An estimated 59,638 people live within 50 km of this point.
Nearby, since 17 March 2026
- August 27, 2026 · score 39 · 17.2 km
How we know
Confirmed by 2 independent sources, including SPC.
Our own score for this event is 32 out of 100, at 89 % 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) | 32 / 100 |
| Our confidence | 89% |
| Coordinates | 47.2800, -111.4300 |
| Nearest City | Great Falls (26 km) |
| Population Exposed | 59.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-03T02:39:58.253Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | 59 |
| Location | 11 SSE Ulm |
| County | Cascade |
| State | MT |
| Comments | 59 mph thunderstorm wind gust. Time estimated. (TFX) |
| Iem TypeSummary | G |
| Iem Magnitude | 59 |
| Iem Unit | MPH |
| Iem City | 11 SSE Ulm |
| Iem County | Cascade |
| Iem State | MT |
| Iem Wfo | TFX |
| Iem Remark | 59 mph thunderstorm wind gust. Time estimated. |
| MergedSources | [{"id":"iem_G_47.280_-111.430_1788385200000","source":"iem","severity":"low","severityValue":25,"timestamp":1788385200000,"latitude":47.28,"longitude":-111.43}] |
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 near Great Falls?
Calamity.live data shows a weather event with CalamityScore 32/100, near Great Falls (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.