This alert expired on 29 June 2026 at 09:00 UTC. It is kept here as a record.
No stronger detection stands among the 73 recorded within 20 km of this point since 17 March 2026 — 66 others scored the same. The last comparable one was on 27 June 2026. 14 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Watch issued June 28 at 8:49AM MDT until June 29 at 3:00AM MDT by NWS Missoula 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
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 60 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 60% |
| Coordinates | 46.8000, -110.4000 |
| Nearest City | Great Falls (103 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-28T21:00:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.1788d2dca00e13b5116b53e0bf97232555898471.001.1 |
Score Breakdown
Technical Details
| Event | Flood Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Flathead, MT; Lake, MT |
| Headline | Flood Watch issued June 28 at 8:49AM MDT until June 29 at 3:00AM MDT by NWS Missoula MT |
| Expires | 2026-06-29T03:00:00-06:00 |
| SenderName | NWS Missoula MT |
| HasExactCoords | false |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.