This alert expired on 24 July 2026 at 06:30 UTC. It is kept here as a record.
It is the 2nd strongest of the 10 detections recorded within 20 km of this point since 14 March 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 24 at 12:11AM MDT until July 24 at 12:30AM MDT by NWS Great Falls MT
Nearby, since 14 March 2026
- March 14, 2026 · score 22 · 17.4 km
- July 24, 2026 · score 34 · 19.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 61 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 61% |
| Coordinates | 46.1871, -111.4129 |
| Nearest City | Bozeman (63 km) |
| Impact Tier | minor |
| Timestamp | 2026-07-24T06:11:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.321f6a6920030edd59c4d85308dfecd9caf9d0e5.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Broadwater, MT; Gallatin, MT; Jefferson, MT; Lewis and Clark, MT; Meagher, MT |
| Headline | Severe Thunderstorm Warning issued July 24 at 12:11AM MDT until July 24 at 12:30AM MDT by NWS Great Falls MT |
| Expires | 2026-07-24T00:30:00-06:00 |
| SenderName | NWS Great Falls MT |
| HasExactCoords | true |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.