Right now
The most recent data we hold from NOAA arrived 5 minutes ago, and this point is in it.
7 other detections within 20 km in the last 24 hours, the nearest 3 km from here.
This alert expired on 12 September 2026 at 01:30 UTC. It is kept here as a record.
It is the 3rd strongest of the 32 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 11 at 7:41PM CDT until September 11 at 8:30PM CDT by NWS Twin Cities/Chanhassen MN
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 | 45.9247, -95.5978 |
| Nearest City | Willmar (99 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-12T00:41:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.db46bc78ad1aed0bcb659fe71f1b7e2081fc44b4.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Stevens, MN; Lincoln, MN; Big Stone, MN and 4 more areas |
| Headline | Severe Thunderstorm Warning issued September 11 at 7:41PM 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 | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.db46bc78ad1aed0bcb659fe71f1b7e2081fc44b4.001.1","noaa_urn:oid:2.49.0.1.840.0.c72be139d3ccf3e92357433ec5f7f0bf6e7e2743.001.1","noaa_urn:oid:2.49.0.1.840.0.49898d23b905730e5e1d7c24e88169ee852ad9b4.001.1","noaa_urn:oid:2.49.0.1.840.0.0dfecf4a8538697f1f112c0eb5cbe18242c1b3d8.002.1","noaa_urn:oid:2.49.0.1.840.0.473f39f46c20e69193dbb76b8d6be59011206210.001.1","noaa_urn:oid:2.49.0.1.840.0.c0ae325a2f28ee2c5b2bd42f2ddee604b9c0c6b6.001.1","noaa_urn:oid:2.49.0.1.840.0.18ecf0dc786e667fca8c2820804997c249c2d94b.001.1","noaa_urn:oid:2.49.0.1.840.0.fae8a742571a492b93285d51e7f064970ae2d94f.002.1","noaa_urn:oid:2.49.0.1.840.0.c70a25f16ed56c6fcf01261e776291cb0c53fb96.001.1","noaa_urn:oid:2.49.0.1.840.0.c2c12c392a13686317fc4e09398e91efae4a893f.001.1","noaa_urn:oid:2.49.0.1.840.0.609284745c7b4fdc44dd552fbf407fafecb4953f.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 125 |
| Spc Location | 2 SSE Norcross |
| Spc County | Grant |
| Spc State | MN |
| Spc Comments | (FGF) |
| Iem TypeSummary | H |
| Iem Magnitude | 1.25 |
| Iem Unit | Inch |
| Iem City | 2 SSE Norcross |
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?