This alert expired on 27 May 2026 at 01:05 UTC. It is kept here as a record.
It is the 3rd strongest of the 20 detections recorded within 20 km of this point since 8 April 2026. 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 May 26 at 6:56PM MDT until May 26 at 7:00PM MDT by NWS Glasgow MT
How we know
Confirmed by 5 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 | 48.1080, -105.5100 |
| Nearest City | Williston (140 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-27T00:56:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.dbde21fbd9edfeae4c5253435cc587b035b57708.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | McCone, MT; Richland, MT; Roosevelt, MT; Valley, MT |
| Headline | Severe Thunderstorm Warning issued May 26 at 6:56PM MDT until May 26 at 7:00PM MDT by NWS Glasgow MT |
| Expires | 2026-05-26T19:05:00-06:00 |
| SenderName | NWS Glasgow MT |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 60 |
| Iem Unit | MPH |
| Iem City | 3 ENE Wolf Point |
| Iem County | Roosevelt |
| Iem State | MT |
| Iem Wfo | GGW |
| Iem Remark | ASOS station KOLF Wolf Point Airport. |
| MergedSources | [{"id":"iem_G_48.550_-105.260_1779825000000","source":"iem","severity":"low","severityValue":25,"timestamp":1779825000000,"latitude":48.55,"longitude":-105.26},{"id":"iem_G_47.700_-104.730_1779831000000","source":"iem","severity":"low","severityValue":25,"timestamp":1779831000000,"latitude":47.7,"longitude":-104.73},{"id":"iem_D_47.950_-104.940_1779834600000","source":"iem","severity":"low","severityValue":25,"timestamp":1779834600000,"latitude":47.95,"longitude":-104.94},{"id":"iem_G_48.100_-105.580_1779839580000","source":"iem","severity":"low","severityValue":25,"timestamp":1779839580000,"latitude":48.1,"longitude":-105.58}] |
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.
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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.