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.
One other detection within 20 km in the last 24 hours, <1 km from here.
This alert is in force until 12 September 2026, 03:00 UTC.
It is the 129th strongest of the 188 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 4 September 2026. 16 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued September 11 at 6:40PM CDT until September 11 at 10:00PM CDT by NWS Aberdeen SD
An estimated 16,788 people live within 50 km of this point.
Nearby, since 15 March 2026
- September 11, 2026 · score 28 · 0.0 km
- September 4, 2026 · score 28 · 0.0 km
- September 3, 2026 · score 28 · 0.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 28 out of 100, at 81 % 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) | 28 / 100 |
| Our confidence | 81% |
| Coordinates | 46.0000, -94.3000 |
| Nearest City | Sartell (43 km) |
| Population Exposed | 16.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-11T23:40:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.1fb6214587565864c838538ae93d083a991c904e.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Big Stone, MN; Deuel, SD; Chippewa, MN; Douglas, MN; Kandiyohi, MN; Lac qui Parle, MN; Morrison, MN; Pope, MN; Stearns, MN; Stevens, MN; Swift, MN; Todd, MN; Yellow Medicine, MN; Lincoln, MN; Lyon, MN; Pipestone, MN; Rock, MN; Brookings, SD; Lake, SD; McCook, SD; Minnehaha, SD; Moody, SD |
| Headline | Severe Thunderstorm Watch issued September 11 at 6:40PM CDT until September 11 at 10:00PM CDT by NWS Aberdeen SD |
| Expires | 2026-09-11T22:00:00-05:00 |
| SenderName | NWS Aberdeen SD |
| HasExactCoords | false |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1fb6214587565864c838538ae93d083a991c904e.001.1","noaa_urn:oid:2.49.0.1.840.0.f07c1d820f24b3da3cbdcc3f9565a76bd7dfc082.001.1","noaa_urn:oid:2.49.0.1.840.0.037d417648b89606146aca2ba12a23f46244fc38.001.1"] |
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.
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