Right now
The most recent data we hold from NOAA arrived 11 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
This alert expired on 19 September 2026 at 09:18 UTC. It is kept here as a record.
What the source measured
NOAA reported: Flash Flood Warning issued September 19 at 4:08AM CDT until September 19 at 4:15AM CDT by NWS La Crosse WI
Urban PEI: 112,225 within a heuristic 50 km radius; not unique people.
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 37 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) | 37 / 100 |
| Legacy data-support index | 0.86/1 |
| Coordinates | 43.6797, -92.2318 |
| Nearest City | Rochester (42 km) |
| Urban exposure index (PEI) | 112.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-19T09:08:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.bc2d428fd270e218c729fef169e709dc73d5c7b6.001.1 |
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: 2026-09-19T09:08:00.000Z.
First archived: 2026-09-19T09:10:50.441Z. 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 | Vernon, WI; Fillmore, MN; Faribault, MN; Freeborn, MN; Steele, MN; Waseca, MN |
| Headline | Flash Flood Warning issued September 19 at 4:08AM CDT until September 19 at 4:15AM CDT by NWS La Crosse WI |
| Expires | 2026-09-19T04:18:00-05:00 |
| SenderName | NWS La Crosse WI |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.bc2d428fd270e218c729fef169e709dc73d5c7b6.001.1","noaa_urn:oid:2.49.0.1.840.0.db41f7c84ce486e8c786c504917bc42c68a2f230.001.1","noaa_urn:oid:2.49.0.1.840.0.dd1b220477d55a6174e58c65c830957b235c4f97.001.1"] |
| Iem TypeSummary | E |
| Iem City | 2 W Fillmore |
| Iem County | Fillmore |
| Iem State | MN |
| Iem Wfo | ARX |
| Iem Remark | Deer Creek flooding. |
| MergedSources | [{"id":"iem_F_43.780_-92.890_1789794360000","source":"iem","severity":"low","severityValue":25,"timestamp":1789794360000,"latitude":43.78,"longitude":-92.89},{"id":"iem_R_43.740_-92.300_1789804800000","source":"iem","severity":"low","severityValue":25,"timestamp":1789804800000,"latitude":43.74,"longitude":-92.3},{"id":"iem_F_43.780_-92.870_1789794780000","source":"iem","severity":"low","severityValue":25,"timestamp":1789794780000,"latitude":43.78,"longitude":-92.87},{"id":"iem_F_43.750_-92.160_1789799100000","source":"iem","severity":"low","severityValue":25,"timestamp":1789799100000,"latitude":43.75,"longitude":-92.16},{"id":"iem_F_43.800_-92.870_1789794420000","source":"iem","severity":"low","severityValue":25,"timestamp":1789794420000,"latitude":43.8,"longitude":-92.87},{"id":"iem_E_43.740_-92.300_1789804800000","source":"iem","severity":"low","severityValue":25,"timestamp":1789804800000,"latitude":43.74,"longitude":-92.3}] |
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.
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