This alert expired on 30 June 2026 at 13:15 UTC. It is kept here as a record.
It is the strongest of the 40 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 30 at 7:45AM CDT until June 30 at 8:15AM CDT by NWS La Crosse WI
An estimated 94,872 people live within 50 km of this point.
Nearby, since 15 March 2026
- August 9, 2026 · score 39 · 12.8 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 45 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 | high |
| Calamity Score (ours) | 45 / 100 |
| Our confidence | 91% |
| Coordinates | 44.3917, -91.2750 |
| Nearest City | Winona (48 km) |
| Population Exposed | 94.9K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-06-30T12:45:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.a623e1d8195532794bc8af904a2c6d0144d8d702.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Trempealeau, WI |
| Headline | Severe Thunderstorm Warning issued June 30 at 7:45AM CDT until June 30 at 8:15AM CDT by NWS La Crosse WI |
| Expires | 2026-06-30T08:15:00-05:00 |
| SenderName | NWS La Crosse WI |
| HasExactCoords | true |
| Spc ReportType | hail |
| Spc Speed | 175 |
| Spc Location | Independence |
| Spc County | Trempealeau |
| Spc State | WI |
| Spc Comments | Relayed by 911 call center. (ARX) |
| Iem TypeSummary | H |
| Iem Magnitude | 1.75 |
| Iem Unit | Inch |
| Iem City | Independence |
| Iem County | Trempealeau |
| Iem State | WI |
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 45/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.