This alert expired on 30 June 2026 at 10:45 UTC. It is kept here as a record.
It is the 35th strongest of the 43 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 15 May 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 30 at 4:57AM CDT until June 30 at 5:45AM CDT by NWS Twin Cities/Chanhassen MN
An estimated 58,718 people live within 50 km of this point.
Nearby, since 15 March 2026
- September 2, 2026 · score 45 · 15.0 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 32 out of 100, at 91 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 32 / 100 |
| Our confidence | 91% |
| Coordinates | 43.8600, -93.8827 |
| Nearest City | Mankato (35 km) |
| Population Exposed | 58.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-30T09:57:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.0f21825d0ca25616c245434b9e57e70279d44550.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Blue Earth, MN; Faribault, MN; Freeborn, MN; Waseca, MN |
| Headline | Severe Thunderstorm Warning issued June 30 at 4:57AM CDT until June 30 at 5:45AM CDT by NWS Twin Cities/Chanhassen MN |
| Expires | 2026-06-30T05:45:00-05:00 |
| SenderName | NWS Twin Cities/Chanhassen MN |
| HasExactCoords | true |
| Spc ReportType | wind |
| Spc Speed | 60 |
| Spc Location | 3 E St. James |
| Spc County | Watonwan |
| Spc State | MN |
| Spc Comments | St. James Municipal Airport ASOS recorded a 60 mph wind gust. (MPX) |
| MergedSources | [{"id":"spc_wind_43.68_-94.62_129","source":"spc","severity":"medium","severityValue":45,"timestamp":1782807000000,"latitude":43.68,"longitude":-94.62},{"id":"spc_wind_43.96_-94.80_132","source":"spc","severity":"medium","severityValue":45,"timestamp":1782807300000,"latitude":43.96,"longitude":-94.8},{"id":"spc_wind_43.86_-94.53_133","source":"spc","severity":"medium","severityValue":45,"timestamp":1782807720000,"latitude":43.86,"longitude":-94.53},{"id":"spc_wind_43.99_-94.56_134","source":"spc","severity":"medium","severityValue":45,"timestamp":1782808500000,"latitude":43.99,"longitude":-94.56}] |
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?
Calamity.live data shows a weather event with CalamityScore 32/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.