Right now
The most recent data we hold from NOAA arrived 2 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
4 other detections within 20 km in the last 24 hours, the nearest 15 km from here.
This alert expired on 12 September 2026 at 00:30 UTC. It is kept here as a record.
It is the 12th strongest of the 23 detections recorded within 20 km of this point since 14 May 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 11 at 6:28PM CDT until September 11 at 7:30PM CDT by NWS Grand Forks ND
Nearby, since 14 May 2026
- September 11, 2026 · score 28 · 15.4 km
- June 10, 2026 · score 22 · 18.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 16 out of 100, at 61 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 16 / 100 |
| Our confidence | 61% |
| Coordinates | 45.8136, -96.1432 |
| Nearest City | Willmar (116 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-11T23:28:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.a5e928feb34941453bf071e0c9769af10b25c4f4.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Grant, MN; Traverse, MN |
| Headline | Severe Thunderstorm Warning issued September 11 at 6:28PM CDT until September 11 at 7:30PM CDT by NWS Grand Forks ND |
| Expires | 2026-09-11T19:30:00-05:00 |
| SenderName | NWS Grand Forks ND |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a5e928feb34941453bf071e0c9769af10b25c4f4.001.1","noaa_urn:oid:2.49.0.1.840.0.aa43ceb62d25f77c62039008c3e88d3029bab11d.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 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?