This alert expired on 30 June 2026 at 11:15 UTC. It is kept here as a record.
It is the 13th strongest of the 19 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 30 at 5:57AM CDT until June 30 at 6:15AM CDT by NWS Twin Cities/Chanhassen MN
An estimated 91,612 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 7, 2026 · score 39 · 7.4 km
- July 20, 2026 · score 39 · 12.8 km
- March 15, 2026 · score 45 · 16.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 32 out of 100, at 81 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 32 / 100 |
| Our confidence | 81% |
| Coordinates | 43.8667, -93.1733 |
| Nearest City | Owatonna (24 km) |
| Population Exposed | 91.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-30T10:57:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.4b60d471e134c1c65e8b75cbaee9a4def5bdb4a0.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Freeborn, MN; Steele, MN |
| Headline | Severe Thunderstorm Warning issued June 30 at 5:57AM CDT until June 30 at 6:15AM CDT by NWS Twin Cities/Chanhassen MN |
| Expires | 2026-06-30T06:15:00-05:00 |
| SenderName | NWS Twin Cities/Chanhassen MN |
| HasExactCoords | true |
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 10 February 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 near Owatonna?
Calamity.live data shows a weather event with CalamityScore 32/100, near Owatonna (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.