This alert expired on 3 July 2026 at 07:05 UTC. It is kept here as a record.
No stronger detection stands among the 21 recorded within 20 km of this point since 8 April 2026 — 7 others scored the same. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 3 at 12:55AM MDT until July 3 at 1:00AM MDT by NWS Glasgow MT
An estimated 26,977 people live within 50 km of this point.
Nearby, since 8 April 2026
- June 28, 2026 · score 34 · 19.7 km
- July 4, 2026 · score 34 · 22.1 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 85 % 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) | 34 / 100 |
| Our confidence | 85% |
| Coordinates | 48.2011, -103.9427 |
| Nearest City | Williston (25 km) |
| Population Exposed | 27.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-03T06:55:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.bb87a5da297bc75e8a2ea0ad304bc669 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Richland, MT; Roosevelt, MT; McKenzie, ND; Williams, ND; Divide, ND; Williams, ND |
| Headline | Severe Thunderstorm Warning issued July 3 at 12:55AM MDT until July 3 at 1:00AM MDT by NWS Glasgow MT |
| Expires | 2026-07-03T01:05:00-06:00 |
| SenderName | NWS Glasgow MT |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.bb87a5da297bc75e8a2ea0ad304bc6698e5760f8.001.1","noaa_urn:oid:2.49.0.1.840.0.7bf7fd64d4fe75a0f18c9c3d39a508ac8eddd21d.001.1","noaa_urn:oid:2.49.0.1.840.0.b6e12df228874b34f9ed9862a204df595d4ba2b0.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 68 |
| 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) Sioux Pass MT-16 MP 21, MT (MT DOT - GGW) Elev: 2480.0 ft; Lat/Lon: 47.91973/-104.32619. |
| MergedSources | [{"id":"iem_G_47.920_-104.330_1783058400000","source":"iem","severity":"low","severityValue":25,"timestamp":1783058400000,"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.
Want to know when something happens near Williston?
Calamity.live data shows a weather event with CalamityScore 34/100, near Williston (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.