This alert expired on 17 July 2026 at 00:45 UTC. It is kept here as a record.
No stronger detection stands among the 18 recorded within 20 km of this point since 14 March 2026 — 6 others scored the same. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 16 at 5:42PM MDT until July 16 at 6:45PM MDT by NWS Great Falls MT
An estimated 32,091 people live within 50 km of this point.
Nearby, since 14 March 2026
- July 24, 2026 · score 34 · 6.4 km
- March 14, 2026 · score 22 · 9.7 km
- July 1, 2026 · score 34 · 21.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 out of 100, at 80 % 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) | 34 / 100 |
| Our confidence | 80% |
| Coordinates | 46.3823, -111.5605 |
| Nearest City | Helena (43 km) |
| Population Exposed | 32.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-16T23:42:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.6754c1d330dcac50885d92c74a82a810 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Meagher, MT; Beaverhead, MT; Deer Lodge, MT; Silver Bow, MT and 2 more areas |
| Headline | Severe Thunderstorm Warning issued July 16 at 5:42PM MDT until July 16 at 6:45PM MDT by NWS Great Falls MT |
| Expires | 2026-07-16T18:45:00-06:00 |
| SenderName | NWS Great Falls MT |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6754c1d330dcac50885d92c74a82a8100c7f42f8.001.1","noaa_urn:oid:2.49.0.1.840.0.1b4ad2cf945c57ea03c938f25236ac7e1dc9f75c.001.1","noaa_urn:oid:2.49.0.1.840.0.c0043cec9109fcf5125bf8a902114dad8fe51625.001.1","noaa_urn:oid:2.49.0.1.840.0.79876a09512669fa20207e175e68bffe913c697f.001.1","noaa_urn:oid:2.49.0.1.840.0.af505262483d60694169250739b0f11f0e6386f6.001.1"] |
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 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.