Reported by SPC today.
No stronger detection stands among the 126 recorded within 20 km of this point since 8 March 2026 — 9 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
SPC reported: Wind 83 kt near 5 WSW Great Falls, Cascade, MT. ASOS station KGTF Great Falls Airport. (TFX)
An estimated 59,638 people live within 50 km of this point.
Nearby, since 8 March 2026
- September 3, 2026 · score 45 · 0.0 km
- July 18, 2026 · score 39 · 18.3 km
- August 27, 2026 · score 39 · 18.4 km
How we know
Confirmed by 2 independent sources, including SPC.
Our own score for this event is 45 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 | High |
| Calamity Score (ours) | 45 / 100 |
| Our confidence | 89% |
| Coordinates | 47.4700, -111.3800 |
| Nearest City | Great Falls (7 km) |
| Population Exposed | 59.6K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-09-03T02:39:58.253Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | 83 |
| Location | 5 WSW Great Falls |
| County | Cascade |
| State | MT |
| Comments | ASOS station KGTF Great Falls Airport. (TFX) |
| Iem TypeSummary | G |
| Iem Magnitude | 83 |
| Iem Unit | MPH |
| Iem City | 5 WSW Great Falls |
| Iem County | Cascade |
| Iem State | MT |
| Iem Wfo | TFX |
| Iem Remark | ASOS station KGTF Great Falls Airport. |
| MergedSources | [{"id":"iem_G_47.470_-111.380_1788385980000","source":"iem","severity":"low","severityValue":25,"timestamp":1788385980000,"latitude":47.47,"longitude":-111.38}] |
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 45/100, near Great Falls (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.