Right now
The most recent data we hold from NOAA arrived 10 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 16 September 2026 at 09:32 UTC. It is kept here as a record.
It is the 9th strongest of the 29 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued September 16 at 4:22AM CDT until September 16 at 4:30AM CDT by NWS Quad Cities IA IL
How we know
2 recorded sources include NOAA; independence is not established by this count.
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 | 0.67/1 |
| Coordinates | 40.5393, -91.7950 |
| Nearest City | Burlington (65 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-09-16T09:22:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.f9cf43e2ee1b70b7185b91addd5d7a641c5169e2.001.1 |
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: 2026-09-16T09:22:00.000Z.
First archived: 2026-09-16T09:25:17.589Z. 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 | Lee, IA; Clark, MO; Scotland, MO |
| Headline | Flash Flood Warning issued September 16 at 4:22AM CDT until September 16 at 4:30AM CDT by NWS Quad Cities IA IL |
| Expires | 2026-09-16T04:32:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | true |
| Iem TypeSummary | R |
| Iem Magnitude | 2.9 |
| Iem Unit | Inch |
| Iem City | 4 SSW Crawford |
| Iem County | Scotland |
| Iem State | MO |
| Iem Wfo | DVN |
| Iem Remark | 3-hour rainfall total. |
| MergedSources | [{"id":"iem_R_40.590_-91.840_1789543800000","source":"iem","severity":"low","severityValue":25,"timestamp":1789543800000,"latitude":40.59,"longitude":-91.84},{"id":"iem_R_40.410_-92.290_1789529700000","source":"iem","severity":"low","severityValue":25,"timestamp":1789529700000,"latitude":40.41,"longitude":-92.29}] |
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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