Right now
The most recent data we hold from NOAA arrived 3 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
12 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert expired on 20 September 2026 at 13:00 UTC. It is kept here as a record.
It is the 21st strongest of the 77 detections recorded within 20 km of this point since 10 March 2026. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued September 20 at 3:08AM CDT until September 20 at 8:00AM CDT by NWS Quad Cities IA IL
Urban PEI: 264,706 within a heuristic 50 km radius; not unique people.
Nearby, since 10 March 2026
- July 5, 2026 · score 43 · 2.7 km
- July 20, 2026 · score 43 · 4.2 km
- August 12, 2026 · score 43 · 4.7 km
How we know
3 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 | 0.91/1 |
| Coordinates | 41.6336, -90.8038 |
| Nearest City | Davenport (22 km) |
| Urban exposure index (PEI) | 264.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-20T08:08:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.83f0fb42e08090d270306d562e5168f147c43d80.001.1 |
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: 2026-09-20T08:08:00.000Z.
First archived: 2026-09-20T08:15:04.981Z. 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 | Benton, IA; Cedar, IA; Iowa, IA; Johnson, IA; Jones, IA; Linn, IA; Clinton, IA; Muscatine, IA; Scott, IA; Bureau, IL; Henry, IL; Mercer, IL; Rock Island, IL; Whiteside, IL; De Kalb, IL; La Salle, IL; Lee, IL and 1 more areas |
| Headline | Flash Flood Warning issued September 20 at 3:08AM CDT until September 20 at 8:00AM CDT by NWS Quad Cities IA IL |
| Expires | 2026-09-20T08:00:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.83f0fb42e08090d270306d562e5168f147c43d80.001.1","noaa_urn:oid:2.49.0.1.840.0.8ab5880c78200d7e68bf14b6191fad04b060741b.001.1","noaa_urn:oid:2.49.0.1.840.0.85b68210fc38fef8e98b87fd1c41367c310e90fd.001.1","noaa_urn:oid:2.49.0.1.840.0.45fe6f13adc06894bca109974c0d521ff6186c1a.001.1"] |
| Spc ReportType | wind |
| Spc Speed | 64 |
| Spc Location | Muscatine |
| Spc County | Muscatine |
| Spc State | IA |
| Spc Comments | Measured with a handheld anemometer. (DVN) |
| Iem TypeSummary | R |
| Iem Magnitude | 3.15 |
| Iem Unit | Inch |
| Iem City | 1 NW Park View |
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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