This alert expired on 4 June 2026 at 00:48 UTC. It is kept here as a record.
It is the 3rd strongest of the 35 detections recorded within 20 km of this point since 3 April 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 3 at 7:38PM CDT until June 3 at 7:45PM CDT by NWS Grand Forks ND
An estimated 57,011 people live within 50 km of this point.
Nearby, since 3 April 2026
- June 3, 2026 · score 32 · 3.1 km
- July 24, 2026 · score 63 · 15.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 32 out of 100, at 81 % 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) | 32 / 100 |
| Our confidence | 81% |
| Coordinates | 48.0500, -96.7700 |
| Nearest City | Grand Forks (24 km) |
| Population Exposed | 57.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-04T00:38:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.6a4c6cbe63fdca5ccb4af410ea5298b35d61f7ee.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Polk, MN |
| Headline | Severe Thunderstorm Warning issued June 3 at 7:38PM CDT until June 3 at 7:45PM CDT by NWS Grand Forks ND |
| Expires | 2026-06-03T19:48:00-05:00 |
| SenderName | NWS Grand Forks ND |
| HasExactCoords | true |
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 Grand Forks?
Calamity.live data shows a weather event with CalamityScore 32/100, near Grand Forks (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.