This alert expired on 6 July 2026 at 03:05 UTC. It is kept here as a record.
No stronger detection stands among the 22 recorded within 20 km of this point since 17 March 2026 — 10 others scored the same. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 5 at 8:56PM MDT until July 5 at 9:00PM MDT by NWS Glasgow MT
Nearby, since 17 March 2026
- May 14, 2026 · score 22 · 20.9 km
How we know
Confirmed by 6 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 70 % 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 | 70% |
| Coordinates | 47.3800, -108.6106 |
| Nearest City | Billings (178 km) |
| Impact Tier | minor |
| Timestamp | 2026-07-06T02:56:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.cad909303d82049402e577c74464d59d |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Garfield, MT; Petroleum, MT; Phillips, MT; Blaine, MT; Fergus, MT; Fergus, MT |
| Headline | Severe Thunderstorm Warning issued July 5 at 8:56PM MDT until July 5 at 9:00PM MDT by NWS Glasgow MT |
| Expires | 2026-07-05T21:05:00-06:00 |
| SenderName | NWS Glasgow MT |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.cad909303d82049402e577c74464d59d05b3d6ea.001.1","noaa_urn:oid:2.49.0.1.840.0.09678b524070fae59b8c90056c8e691223994acc.001.1","noaa_urn:oid:2.49.0.1.840.0.d7f932be3e0263a4140c3d51c8bac2fcf8ca413a.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 60 |
| Iem Unit | MPH |
| Iem City | 5 NNE Forestgrove |
| Iem County | Fergus |
| Iem State | MT |
| Iem Wfo | TFX |
| Iem Remark | AWOS station K1NM November. |
| MergedSources | [{"id":"iem_G_47.110_-109.090_1783303200000","source":"iem","severity":"low","severityValue":25,"timestamp":1783303200000,"latitude":47.11,"longitude":-109.09},{"id":"iem_G_47.560_-109.380_1783303620000","source":"iem","severity":"low","severityValue":25,"timestamp":1783303620000,"latitude":47.56,"longitude":-109.38},{"id":"iem_G_47.150_-108.590_1783304700000","source":"iem","severity":"low","severityValue":25,"timestamp":1783304700000,"latitude":47.15,"longitude":-108.59},{"id":"iem_G_47.060_-109.050_1783303080000","source":"iem","severity":"low","severityValue":25,"timestamp":1783303080000,"latitude":47.06,"longitude":-109.05},{"id":"iem_G_47.060_-109.050_1783302960000","source":"iem","severity":"low","severityValue":25,"timestamp":1783302960000,"latitude":47.06,"longitude":-109.05}] |
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 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.