Right now
The most recent data we hold from NOAA arrived 10 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
2 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert expired on 7 September 2026 at 07:00 UTC. It is kept here as a record.
No stronger detection stands among the 76 recorded within 20 km of this point since 17 March 2026 — one other scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued September 6 at 11:27PM MDT until September 7 at 1:00AM MDT by NWS Great Falls MT
Nearby, since 17 March 2026
- September 6, 2026 · score 16 · 0.0 km
- August 30, 2026 · score 22 · 0.0 km
- July 26, 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 | 2026-09-07T05:27:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.c9789a9403980588f3e224c381eddaea572433d0.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Blaine, MT; Fergus, MT |
| Headline | Severe Thunderstorm Watch issued September 6 at 11:27PM 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 | 250 |
| Spc Location | 6 N Moccasin |
| Spc County | Judith Basin |
| Spc State | MT |
| Spc Comments | Report from mPING: Tennis Ball (2.50 in.) 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.