Right now
The most recent data we hold from NOAA arrived 8 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 7 km from here.
This alert expired on 12 September 2026 at 01:30 UTC. It is kept here as a record.
No stronger detection stands among the 123 recorded within 20 km of this point since 15 March 2026 — 95 others scored the same. Another comparable one was recorded here earlier the same day. 103 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 11 at 8:11PM CDT until September 11 at 8:30PM CDT by NWS Twin Cities/Chanhassen MN
Nearby, since 15 March 2026
- June 9, 2026 · score 16 · 3.9 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 28 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 | High |
| Calamity Score (ours) | 28 / 100 |
| Our confidence | 71% |
| Coordinates | 46.0827, -95.1807 |
| Nearest City | Sartell (91 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-12T01:11:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.918dd1afb2ff755b0c1e59ad33990ffd403236c2.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Stevens, MN; Cass, MN; Wadena, MN |
| Headline | Severe Thunderstorm Warning issued September 11 at 8:11PM CDT until September 11 at 8:30PM CDT by NWS Twin Cities/Chanhassen MN |
| Expires | 2026-09-11T20:30:00-05:00 |
| SenderName | NWS Twin Cities/Chanhassen MN |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.918dd1afb2ff755b0c1e59ad33990ffd403236c2.001.1","noaa_urn:oid:2.49.0.1.840.0.1295561aad46161f20c706f16b5f396b30dbc4a4.001.1","noaa_urn:oid:2.49.0.1.840.0.b5a9a51379ffb9eefad47929e9a8f485bdc127ff.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 100 |
| Spc Location | Blue Grass |
| Spc County | Wadena |
| Spc State | MN |
| Spc Comments | (FGF) |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | Blue Grass |
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.
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