This alert expired on 1 July 2026 at 17:15 UTC. It is kept here as a record.
It is the 9th strongest of the 59 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued July 1 at 9:19AM CDT until July 1 at 12:15PM CDT by NWS La Crosse WI
An estimated 148,338 people live within 50 km of this point.
Nearby, since 15 March 2026
- September 2, 2026 · score 49 · 3.8 km
- June 6, 2026 · score 43 · 12.1 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 43 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) | 43 / 100 |
| Our confidence | 91% |
| Coordinates | 44.0277, -91.6769 |
| Nearest City | Winona (4 km) |
| Population Exposed | 148.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-01T14:19:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.924f9ff372042dd4f5c0cb40ff50c599ac67da5a.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Winona, MN |
| Headline | Flash Flood Warning issued July 1 at 9:19AM CDT until July 1 at 12:15PM CDT by NWS La Crosse WI |
| Expires | 2026-07-01T12:15:00-05:00 |
| SenderName | NWS La Crosse WI |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 59 |
| Iem Unit | MPH |
| Iem City | 5 WSW Cummingsville |
| Iem County | Fillmore |
| Iem State | MN |
| Iem Wfo | ARX |
| MergedSources | [{"id":"iem_H_43.840_-92.350_1782906660000","source":"iem","severity":"low","severityValue":25,"timestamp":1782906660000,"latitude":43.84,"longitude":-92.35},{"id":"iem_G_43.840_-92.350_1782906660000","source":"iem","severity":"low","severityValue":25,"timestamp":1782906660000,"latitude":43.84,"longitude":-92.35}] |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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 near Winona?
Calamity.live data shows a weather event with CalamityScore 43/100, near Winona (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.