Right now
The most recent data we hold from NOAA arrived 5 hours ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 25 May 2026 at 04:00 UTC. It is kept here as a record.
It is the 35th strongest of the 191 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued May 24 at 6:54PM CDT until May 24 at 11:00PM CDT by NWS Twin Cities/Chanhassen MN
Urban PEI: 16,788 within a heuristic 50 km radius; not unique people.
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 34 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 34 / 100 |
| Legacy data-support index | 0.79/1 |
| Coordinates | 46.0000, -94.3000 |
| Nearest City | Sartell (43 km) |
| Urban exposure index (PEI) | 16.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-24T23:54:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.35c904828409f1539f6064b49c386683 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-05-24T23:54:00.000Z.
First archived: 2026-05-25T00:54:51.691Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Blue Earth, MN; Le Sueur, MN; Waseca, MN; Brown, MN; Chippewa, MN; Kandiyohi, MN; Lac qui Parle, MN; McLeod, MN; Meeker, MN; Nicollet, MN; Redwood, MN; Renville, MN; Sibley, MN; Swift, MN; Watonwan, MN; Yellow Medicine, MN |
| Headline | Severe Thunderstorm Watch issued May 24 at 6:54PM CDT until May 24 at 11:00PM CDT by NWS Twin Cities/Chanhassen MN |
| Expires | 2026-05-24T23:00:00-05:00 |
| SenderName | NWS Twin Cities/Chanhassen MN |
| HasExactCoords | false |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.35c904828409f1539f6064b49c3866836e738f53.001.1","noaa_urn:oid:2.49.0.1.840.0.35c904828409f1539f6064b49c3866836e738f53.002.1"] |
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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens in this area?