This alert expired on 26 July 2026 at 04:00 UTC. It is kept here as a record.
No stronger detection stands among the 70 recorded within 20 km of this point since 17 March 2026 — 66 others scored the same. Another comparable one was recorded here earlier the same day. 14 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued July 25 at 4:05PM MDT until July 25 at 10:00PM 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 19, 2026 · score 22 · 0.0 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 | 46.8000, -110.4000 |
| Nearest City | Great Falls (103 km) |
| Impact Tier | minor |
| Timestamp | 2026-07-25T22:05:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Cascade, MT; Chouteau, MT; Broadwater, MT; Fergus, MT; Gallatin, MT; Jefferson, MT; Judith Basin, MT; Madison, MT; Meagher, MT; Garfield, MT; Petroleum, MT and 1 more areas |
| Headline | Severe Thunderstorm Watch issued July 25 at 4:05PM MDT until July 25 at 10:00PM MDT by NWS Great Falls MT |
| Expires | 2026-07-25T22:00:00-06:00 |
| SenderName | NWS Great Falls MT |
| HasExactCoords | false |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.879bdc4fc4d796bdfd39ce3a5e9a5755a29510b8.001.1","noaa_urn:oid:2.49.0.1.840.0.879bdc4fc4d796bdfd39ce3a5e9a5755a29510b8.002.1","noaa_urn:oid:2.49.0.1.840.0.571d53485ec28aacbb407ec2b4c30c7bebb75346.001.1","noaa_urn:oid:2.49.0.1.840.0.f088110bd331c7d383140ba6a2a0cc89324d57ca.001.1"] |
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, near Great Falls (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.