Right now
The most recent data we hold from NOAA arrived 2 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
5 other detections within 20 km in the last 24 hours, the nearest 12 km from here.
This alert expired on 19 September 2026 at 10:45 UTC. It is kept here as a record.
It is the 78th strongest of the 106 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 5 September 2026. 14 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued September 19 at 4:26AM CDT until September 19 at 5:45AM CDT by NWS La Crosse WI
Nearby, since 16 March 2026
- September 4, 2026 · score 28 · 6.5 km
- September 5, 2026 · score 28 · 8.0 km
- September 4, 2026 · score 28 · 8.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 16 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 v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 16 / 100 |
| Legacy data-support index | 0.61/1 |
| Coordinates | 42.9800, -91.3649 |
| Nearest City | Dubuque (79 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-09-19T09:26:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.f3811e357797a50d39d6aa6d709dc13abfc4787c.001.1 |
Physical priority index · v5. 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: 2026-09-19T09:26:00.000Z.
First archived: 2026-09-19T09:32:19.078Z. Material modification: 2026-09-19T10:04:43.750Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-19T10:04:43.750Z · data_change
Index 16 → 16; severity medium → medium; version 5 → 5.
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Fillmore, MN; Clayton, IA; Fayette, IA; Dubuque, IA; Jackson, IA; Jo Daviess, IL; Stephenson, IL |
| Headline | Flash Flood Warning issued September 19 at 4:26AM CDT until September 19 at 5:45AM CDT by NWS La Crosse WI |
| Expires | 2026-09-19T05:45:00-05:00 |
| SenderName | NWS La Crosse WI |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f3811e357797a50d39d6aa6d709dc13abfc4787c.001.1","noaa_urn:oid:2.49.0.1.840.0.ddafc4672e8b05976d24ba160ada534ebcdaefb0.001.1","noaa_urn:oid:2.49.0.1.840.0.b5471fbef96be0a448bc76624f7f9455aa41f3e5.001.1"] |
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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens in this area?