Right now
The most recent data we hold from NOAA arrived 5 minutes ago, and this point is in it.
2 other detections within 20 km in the last 24 hours, the nearest 4 km from here.
This alert expired on 12 September 2026 at 01:00 UTC. It is kept here as a record.
No stronger detection stands among the 172 recorded within 20 km of this point since 15 March 2026 — 4 others scored the same. Another comparable one was recorded here earlier the same day. 14 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued September 11 at 7:31PM CDT until September 11 at 8:00PM CDT by NWS Grand Forks ND
Nearby, since 15 March 2026
- June 19, 2026 · score 46 · 18.6 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 46 out of 100, at 66 % 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 | 66% |
| Coordinates | 46.5450, -94.9583 |
| Nearest City | Sartell (118 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-12T00:31:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.c2d3f76def0b365d0044b1129b25f8faebe5f068.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Wadena, MN |
| Headline | Tornado Warning issued September 11 at 7:31PM CDT until September 11 at 8:00PM CDT by NWS Grand Forks ND |
| Expires | 2026-09-11T20:00:00-05:00 |
| SenderName | NWS Grand Forks ND |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 0.5 |
| Iem Unit | Inch |
| Iem City | 5 W Whipholt |
| Iem County | Cass |
| Iem State | MN |
| Iem Wfo | DLH |
| Iem Remark | Several minutes of pea to half inch size hail. Time estimated from radar. |
| MergedSources | [{"id":"iem_H_47.050_-94.470_1789172100000","source":"iem","severity":"low","severityValue":25,"timestamp":1789172100000,"latitude":47.05,"longitude":-94.47}] |
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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