Right now
The most recent data we hold from NOAA arrived 2 hours ago, and this point is in it.
One other detection within 20 km in the last 24 hours, <1 km from here.
This alert is in force until 28 September 2026, 01:45 UTC.
No stronger detection stands among the 10 recorded within 20 km of this point since 16 March 2026 — 3 others scored the same. The last comparable one was on 26 September 2026. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued September 26 at 8:38PM CDT until October 1 at 5:00PM CDT by NWS Quad Cities IA IL
Urban PEI: 266,802 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- September 26, 2026 · score 37 · 0.0 km
- August 14, 2026 · 0.0 km
- August 3, 2026 · 0.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
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 | 0.82/1 |
| Coordinates | 41.8371, -90.6986 |
| Nearest City | Davenport (37 km) |
| Urban exposure index (PEI) | 266.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-27T01:38:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.0ed642483059d9b59eac0b64a2385eaea06ebcc3.001.1 |
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: 2026-09-27T01:38:00.000Z.
First archived: 2026-09-27T01:44:40.118Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-27T06:26:19.068Z · data_change
Index 37 → 37; severity medium → medium; version 5 → 5.
2026-09-27T05:06:32.746Z · data_change
Index 37 → 37; severity medium → medium; version 5 → 5.
2026-09-27T03:20:10.832Z · data_change
Index 37 → 37; severity medium → medium; version 5 → 5.
Score Breakdown
Technical Details
| Event | Flood Warning |
| MessageId | urn:oid:2.49.0.1.840.0.0ed642483059d9b59eac0b64a2385eaea06ebcc3.001.1 |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Clinton, IA; Scott, IA |
| Headline | Flood Warning issued September 26 at 8:38PM CDT until October 1 at 5:00PM CDT by NWS Quad Cities IA IL |
| Expires | 2026-09-27T20:45:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | true |
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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