Right now
The most recent data we hold from NOAA arrived 4 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 26 May 2026 at 22:00 UTC. It is kept here as a record.
No stronger detection stands among the 23 recorded within 20 km of this point since 23 April 2026 — 14 others scored the same. The last comparable one was on 14 May 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 26 at 3:22PM MDT until May 26 at 4:00PM MDT by NWS Glasgow MT
Nearby, since 23 April 2026
- July 9, 2026 · score 22 · 16.9 km
- May 26, 2026 · score 22 · 18.0 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 69 % 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 | 69% |
| Coordinates | 47.9820, -104.7900 |
| Nearest City | Williston (89 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-26T21:22:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.8860793ced234dff9e5246fc4c4665d9221b03d2.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | McCone, MT; Richland, MT; Roosevelt, MT |
| Headline | Severe Thunderstorm Warning issued May 26 at 3:22PM MDT until May 26 at 4:00PM MDT by NWS Glasgow MT |
| Expires | 2026-05-26T16:00:00-06:00 |
| SenderName | NWS Glasgow MT |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 53 |
| Iem Unit | MPH |
| Iem City | 12 WSW Nohly |
| Iem County | Richland |
| Iem State | MT |
| Iem Wfo | GGW |
| Iem Remark | Mesonet station MTSOO 16.0 SW Bainville (MT DOT). |
| 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_47.920_-104.330_1779822000000","source":"iem","severity":"low","severityValue":25,"timestamp":1779822000000,"latitude":47.92,"longitude":-104.33}] |
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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