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.
7 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert expired on 12 September 2026 at 01:04 UTC. It is kept here as a record.
No stronger detection stands among the 102 recorded within 20 km of this point since 15 March 2026 — one other scored the same. Another comparable one was recorded here earlier the same day. 76 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued September 11 at 7:55PM CDT until September 11 at 8:00PM CDT by NWS Grand Forks ND
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 46 out of 100, at 71 % 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 | Critical |
| Calamity Score (ours) | 46 / 100 |
| Our confidence | 71% |
| Coordinates | 46.0125, -95.5452 |
| Nearest City | Willmar (107 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-12T00:55:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.19c65b4e590e13e637a37bc4e2f92465a6324095.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Wadena, MN; Stevens, MN |
| Headline | Tornado Warning issued September 11 at 7:55PM CDT until September 11 at 8:00PM CDT by NWS Grand Forks ND |
| Expires | 2026-09-11T20:04:00-05:00 |
| SenderName | NWS Grand Forks ND |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.19c65b4e590e13e637a37bc4e2f92465a6324095.001.1","noaa_urn:oid:2.49.0.1.840.0.fae5c51d782f8f771530c59d8949d9e98e533a65.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 100 |
| Spc Location | Chokio |
| Spc County | Stevens |
| Spc State | MN |
| Spc Comments | (MPX) |
| Iem TypeSummary | H |
| Iem Magnitude | 1.25 |
| Iem Unit | Inch |
| Iem City | 2 SSE Norcross |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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.
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