Right now
The most recent data we hold from NOAA arrived 4 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 <1 km from here.
This alert expired on 19 September 2026 at 15:18 UTC. It is kept here as a record.
It is the 7th strongest of the 43 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued September 19 at 10:08AM CDT until September 19 at 10:15AM CDT by NWS Quad Cities IA IL
Urban PEI: 58,799 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- June 11, 2026 · score 32 · 7.5 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 32 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) | 32 / 100 |
| Legacy data-support index | 0.86/1 |
| Coordinates | 42.4693, -90.6080 |
| Nearest City | Dubuque (5 km) |
| Urban exposure index (PEI) | 58.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-19T15:08:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.6a8cf27426be478b34fb738422e215341515b80e.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: 2026-09-19T15:08:00.000Z.
First archived: 2026-09-19T15:12:02.965Z. 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 | Dubuque, IA; Jackson, IA; Jo Daviess, IL; Stephenson, IL |
| Headline | Flash Flood Warning issued September 19 at 10:08AM CDT until September 19 at 10:15AM CDT by NWS Quad Cities IA IL |
| Expires | 2026-09-19T10:18:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | true |
| Iem TypeSummary | R |
| Iem Magnitude | 4.53 |
| Iem Unit | Inch |
| Iem City | 5 S Muscoda |
| Iem County | Grant |
| Iem State | WI |
| Iem Wfo | ARX |
| Iem Remark | Cocorahs station WI-GT-22 4 S Muscoda. |
| MergedSources | [{"id":"iem_R_42.830_-90.690_1789818060000","source":"iem","severity":"low","severityValue":25,"timestamp":1789818060000,"latitude":42.83,"longitude":-90.69},{"id":"iem_R_42.410_-90.730_1789819200000","source":"iem","severity":"low","severityValue":25,"timestamp":1789819200000,"latitude":42.41,"longitude":-90.73},{"id":"iem_R_42.860_-90.700_1789809780000","source":"iem","severity":"low","severityValue":25,"timestamp":1789809780000,"latitude":42.86,"longitude":-90.7},{"id":"iem_R_42.800_-91.100_1789819200000","source":"iem","severity":"low","severityValue":25,"timestamp":1789819200000,"latitude":42.8,"longitude":-91.1},{"id":"iem_R_42.750_-90.840_1789819200000","source":"iem","severity":"low","severityValue":25,"timestamp":1789819200000,"latitude":42.75,"longitude":-90.84},{"id":"iem_R_42.790_-91.100_1789815600000","source":"iem","severity":"low","severityValue":25,"timestamp":1789815600000,"latitude":42.79,"longitude":-91.1},{"id":"iem_R_42.940_-90.920_1789819620000","source":"iem","severity":"low","severityValue":25,"timestamp":1789819620000,"latitude":42.94,"longitude":-90.92},{"id":"iem_R_42.940_-90.970_1789819200000","source":"iem","severity":"low","severityValue":25,"timestamp":1789819200000,"latitude":42.94,"longitude":-90.97},{"id":"iem_R_42.540_-90.950_1789824000000","source":"iem","severity":"low","severityValue":25,"timestamp":1789824000000,"latitude":42.54,"longitude":-90.95},{"id":"iem_R_42.740_-90.490_1789821600000","source":"iem","severity":"low","severityValue":25,"timestamp":1789821600000,"latitude":42.74,"longitude":-90.49},{"id":"iem_R_43.020_-91.120_1789817700000","source":"iem","severity":"low","severityValue":25,"timestamp":1789817700000,"latitude":43.02,"longitude":-91.12},{"id":"iem_R_42.980_-90.660_1789819140000","source":"iem","severity":"low","severityValue":25,"timestamp":1789819140000,"latitude":42.98,"longitude":-90.66},{"id":"iem_R_42.510_-90.790_1789820400000","source":"iem","severity":"low","severityValue":25,"timestamp":1789820400000,"latitude":42.51,"longitude":-90.79},{"id":"iem_R_42.510_-90.720_1789819260000","source":"iem","severity":"low","severityValue":25,"timestamp":1789819260000,"latitude":42.51,"longitude":-90.72},{"id":"iem_R_43.120_-90.450_1789819200000","source":"iem","severity":"low","severityValue":25,"timestamp":1789819200000,"latitude":43.12,"longitude":-90.45}] |
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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