Severe Weather in United States
Reported by SPC today.
It is the 2nd strongest of the 19 detections recorded within 20 km of this point since 18 March 2026. The last comparable one was on 18 July 2026.
What the source measured
SPC reported: Wind 71 kt near 13 SW Augusta, Lewis and Clark, MT. Mesonet station TR276 L-C Portable No. 1. (TFX)
How we know
Confirmed by 2 independent sources, including SPC.
Our own score for this event is 16 out of 100, at 70 % 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 | 70% |
| Coordinates | 47.3400, -112.5500 |
| Nearest City | Helena (92 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-02T21:29:00.000Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | 71 |
| Location | 13 SW Augusta |
| County | Lewis and Clark |
| State | MT |
| Comments | Mesonet station TR276 L-C Portable No. 1. (TFX) |
| Iem TypeSummary | G |
| Iem Magnitude | 71 |
| Iem Unit | MPH |
| Iem City | 13 SW Augusta |
| Iem County | Lewis and Clark |
| Iem State | MT |
| Iem Wfo | TFX |
| Iem Remark | Mesonet station TR276 L-C Portable No. 1. |
| MergedSources | [{"id":"iem_G_47.340_-112.550_1788384540000","source":"iem","severity":"low","severityValue":25,"timestamp":1788384540000,"latitude":47.34,"longitude":-112.55}] |
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 spc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.