This alert expired on 20 July 2026 at 23:15 UTC. It is kept here as a record.
It is the 6th strongest of the 70 detections recorded within 20 km of this point since 10 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 July 20 at 1:11PM CDT until July 20 at 6:15PM CDT by NWS Quad Cities IA IL
An estimated 264,706 people live within 50 km of this point.
Nearby, since 10 March 2026
- July 20, 2026 · score 43 · 9.8 km
- July 5, 2026 · score 43 · 13.8 km
- August 12, 2026 · score 43 · 15.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 81 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 81% |
| Coordinates | 41.5116, -90.7997 |
| Nearest City | Rock Island (18 km) |
| Population Exposed | 264.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-20T18:11:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.0210d78fab5a290e02dae83e398e4eef |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Rock Island, IL; Cedar, IA; Muscatine, IA; Scott, IA |
| Headline | Flash Flood Warning issued July 20 at 1:11PM CDT until July 20 at 6:15PM CDT by NWS Quad Cities IA IL |
| Expires | 2026-07-20T18:15:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0210d78fab5a290e02dae83e398e4eefb69e096c.001.1","noaa_urn:oid:2.49.0.1.840.0.81d02a8a688c70c919df1cc64a93ef9859440cba.001.1"] |
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.
Want to know when something happens near Rock Island?
Calamity.live data shows a weather event with CalamityScore 43/100, near Rock Island (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.