This alert expired on 7 June 2026 at 08:00 UTC. It is kept here as a record.
No stronger detection stands among the 14 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. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 7 at 2:46AM CDT until June 7 at 3:00AM CDT by NWS Bismarck ND
An estimated 26,977 people live within 50 km of this point.
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 81 % 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 | 81% |
| Coordinates | 47.8786, -103.7906 |
| Nearest City | Williston (33 km) |
| Population Exposed | 27.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-07T07:46:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | McKenzie, ND; Williams, ND; Richland, MT; Roosevelt, MT |
| Headline | Severe Thunderstorm Warning issued June 7 at 2:46AM CDT until June 7 at 3:00AM CDT by NWS Bismarck ND |
| Expires | 2026-06-07T03:00:00-05:00 |
| SenderName | NWS Bismarck ND |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ffcd1bc143b02e1c05cca2aa8190812ad9accf8b.001.1","noaa_urn:oid:2.49.0.1.840.0.c22fa8db1f2575dbef84128b49180595806d8159.001.1"] |
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, near Williston (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.