Right now
The most recent data we hold from NOAA arrived 25 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 9 July 2026 at 16:45 UTC. It is kept here as a record.
It is the 4th strongest of the 57 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 4 July 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued July 8 at 8:34PM CDT until July 9 at 10:30PM CDT by NWS La Crosse WI
Urban PEI: 278,494 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- September 9, 2026 · score 37 · 5.9 km
- August 7, 2026 · score 67 · 6.7 km
- August 7, 2026 · score 37 · 8.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
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 | 0.80/1 |
| Coordinates | 41.8973, -91.1422 |
| Nearest City | Marion (41 km) |
| Urban exposure index (PEI) | 278.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-09T09:00:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flood Warning_noaa_urn:oid:2.49.0.1.840.0.cfd9e2afd10813eb3828270461faf6a7 |
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: 2026-07-09T09:00:00.000Z.
First archived: 2026-07-09T01:35:26.933Z. 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 | Flood Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Mower, MN; Howard, IA; Mitchell, IA; Winneshiek, IA; Fillmore, MN; Mower, MN; Benton, IA; Iowa, IA and 5 more areas |
| Headline | Flood Warning issued July 8 at 8:34PM CDT until July 9 at 10:30PM CDT by NWS La Crosse WI |
| Expires | 2026-07-09T11:45:00-05:00 |
| SenderName | NWS La Crosse WI |
| HasExactCoords | true |
| MergedCount | 9 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.cfd9e2afd10813eb3828270461faf6a71fa2d04e.001.1","noaa_urn:oid:2.49.0.1.840.0.6f846d23f9f7a2869125a162e146ee7dfc4b603a.001.1","noaa_urn:oid:2.49.0.1.840.0.dd5419661fccb2cea8ac2478ccb96e4d3d80a949.001.1","noaa_urn:oid:2.49.0.1.840.0.8b519d85155420d631cd642cc636190a8cb053a9.001.1","noaa_urn:oid:2.49.0.1.840.0.c1a1e0a59c2c75c235157da8e2e275d85de87519.001.1","noaa_urn:oid:2.49.0.1.840.0.ace56f678a35dd0d77b48b91505da69eb8b24cde.001.1","noaa_urn:oid:2.49.0.1.840.0.ace56f678a35dd0d77b48b91505da69eb8b24cde.003.1","noaa_urn:oid:2.49.0.1.840.0.ace56f678a35dd0d77b48b91505da69eb8b24cde.002.1","noaa_urn:oid:2.49.0.1.840.0.0cc4dfc3b179c8a01f79bf39017a6627475aafa5.001.1"] |
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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