Right now
The most recent data we hold from NOAA arrived 54 minutes 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 2 July 2026 at 13:00 UTC. It is kept here as a record.
No stronger detection stands among the 39 recorded within 20 km of this point since 15 March 2026 — 26 others scored the same. The last comparable one was on 11 June 2026.
What the source measured
NOAA reported: Flash Flood Warning issued July 2 at 5:59AM CDT until July 2 at 8:00AM CDT by NWS La Crosse WI
Urban PEI: 121,244 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- July 4, 2026 · score 43 · 6.0 km
- July 3, 2026 · score 43 · 6.3 km
- May 18, 2026 · score 43 · 22.9 km
How we know
5 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.91/1 |
| Coordinates | 43.5340, -91.5380 |
| Nearest City | La Crosse (38 km) |
| Urban exposure index (PEI) | 121.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-02T10:59:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.6dd4901569a315837cb7f623da5b66c99002b722.001.1 |
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: 2026-07-02T10:59:00.000Z.
First archived: 2026-07-02T12:51:55.743Z. 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 | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Houston, MN |
| Headline | Flash Flood Warning issued July 2 at 5:59AM CDT until July 2 at 8:00AM CDT by NWS La Crosse WI |
| Expires | 2026-07-02T08:00:00-05:00 |
| SenderName | NWS La Crosse WI |
| HasExactCoords | true |
| Iem TypeSummary | R |
| Iem Magnitude | 2.75 |
| Iem Unit | Inch |
| Iem City | Galesville |
| Iem County | Trempealeau |
| Iem State | WI |
| Iem Wfo | ARX |
| MergedSources | [{"id":"iem_R_43.800_-90.770_1782986520000","source":"iem","severity":"low","severityValue":25,"timestamp":1782986520000,"latitude":43.8,"longitude":-90.77},{"id":"iem_R_43.550_-92.010_1782968400000","source":"iem","severity":"low","severityValue":25,"timestamp":1782968400000,"latitude":43.55,"longitude":-92.01},{"id":"iem_R_43.710_-92.270_1782976680000","source":"iem","severity":"low","severityValue":25,"timestamp":1782976680000,"latitude":43.71,"longitude":-92.27},{"id":"iem_R_44.080_-91.360_1782993900000","source":"iem","severity":"low","severityValue":25,"timestamp":1782993900000,"latitude":44.08,"longitude":-91.36}] |
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.
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