Reported by SPC today.
It is the 6th strongest of the 13 detections recorded within 20 km of this point since 13 May 2026. The last comparable one was on 2 September 2026.
What the source measured
SPC reported: Wind 62 kt near 10 SE Boulder, Jefferson, MT. Mesonet station MTBLS Boulder South Mt-69 Mp 27.7. (TFX)
An estimated 34,190 people live within 50 km of this point.
Nearby, since 13 May 2026
- May 13, 2026 · score 34 · 4.5 km
- May 13, 2026 · score 39 · 14.3 km
How we know
One source: SPC. Not yet confirmed by a second, independent source.
Our own score for this event is 28 out of 100, at 75 % 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) | 28 / 100 |
| Our confidence | 75% |
| Coordinates | 46.1300, -111.9800 |
| Nearest City | Butte (45 km) |
| Population Exposed | 34.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-03T05:28:47.388Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | 62 |
| Location | 10 SE Boulder |
| County | Jefferson |
| State | MT |
| Comments | Mesonet station MTBLS Boulder South Mt-69 Mp 27.7. (TFX) |
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 28/100 (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.