Right now
The most recent data we hold from NOAA arrived 2 minutes ago, and this point is in it.
Nothing else has been detected within 20 km in the last 24 hours.
This alert is in force until 7 September 2026, 07:00 UTC.
It is the strongest of the 74 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 2 September 2026.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued September 6 at 5:53PM MDT until September 7 at 1:00AM 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 3 independent sources, including NOAA.
Our own score for this event is 28 out of 100, at 71 % 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) | 28 / 100 |
| Our confidence | 71% |
| Coordinates | 46.8000, -110.4000 |
| Nearest City | Great Falls (103 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-06T23:53:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.ad945ae0df2d38770f2e437475df79a0f0515833.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Blaine, MT; Broadwater, MT; Cascade, MT; Chouteau, MT; Fergus, MT; Hill, MT; Judith Basin, MT; Lewis and Clark, MT; Liberty, MT; Meagher, MT |
| Headline | Severe Thunderstorm Watch issued September 6 at 5:53PM MDT until September 7 at 1:00AM MDT by NWS Great Falls MT |
| Expires | 2026-09-07T01:00:00-06:00 |
| SenderName | NWS Great Falls MT |
| HasExactCoords | false |
| Spc ReportType | hail |
| Spc Speed | 100 |
| Spc Location | 4 SSW Geyser |
| Spc County | Judith Basin |
| Spc State | MT |
| Spc Comments | Estimated. (TFX) |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 4 SSW Geyser |
| Iem County | Judith Basin |
| Iem State | MT |
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 noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.