Right now
The most recent data we hold from NOAA arrived 13 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 4 June 2026 at 22:00 UTC. It is kept here as a record.
No stronger detection stands among the 16 recorded within 20 km of this point since 15 March 2026 — 10 others scored the same. The last comparable one was on 3 April 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 4 at 4:48PM CDT until June 4 at 5:00PM CDT by NWS Twin Cities/Chanhassen MN
An estimated 19,638 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 20, 2026 · score 34 · 21.5 km
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.
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 | 81% |
| Coordinates | 45.2480, -95.4510 |
| Nearest City | Willmar (35 km) |
| Population Exposed | 19.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-04T21:48:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.058e07ccbf5f80d9b4fcd0b5eadc3d0cf93410f2.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Chippewa, MN; Swift, MN |
| Headline | Severe Thunderstorm Warning issued June 4 at 4:48PM CDT until June 4 at 5:00PM CDT by NWS Twin Cities/Chanhassen MN |
| Expires | 2026-06-04T17:00:00-05:00 |
| SenderName | NWS Twin Cities/Chanhassen MN |
| 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 in this area?
Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.