Alert archive / Illinois / Cook County / River Flood Warnings
River Flood Warnings in Cook County, Illinois, 2026
28 river flood warnings in 2026. An alert counts here when it covered this county. The archive of river flood warnings reaches back to 2005.
Cook County and its neighbors
Each county as a circle sized by its count in 2026. Tap one for its archive.
- River Flood Warnings
- 28
- Busiest month
- June10 river flood warnings
- Busiest day
- April 15, 20262 river flood warnings
Over time
By month
The alerts
Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 7, 1:09 AM CST | River Flood Warning | LOT | 17 hr |
| Mar 11, 1:35 AM CDT | River Flood Warning | LOT | 9 hr |
| Mar 16, 4:40 AM CDT | River Flood Warning | LOT | 6 hr |
| Apr 4, 6:37 AM CDT | River Flood Warning | LOT | 24 hr |
| Apr 6, 8:23 PM CDT | River Flood Warning | LOT | 61 hr |
| Apr 15, 10:32 AM CDT | River Flood Warning | LOT | 10 days |
| Apr 15, 10:32 AM CDT | River Flood Warning | LOT | 10 days |
| Apr 17, 10:59 PM CDT | River Flood Warning | LOT | 22 hr |
| Jun 11, 9:44 PM CDT | River Flood Warning | LOT | 37 hr |
| Jun 11, 9:47 PM CDT | River Flood Warning | LOT | 19 hr |
| Jun 14, 9:13 AM CDT | River Flood Warning | LOT | 18 hr |
| Jun 14, 9:18 AM CDT | River Flood Warning | LOT | 22 hr |
| Jun 17, 4:47 PM CDT | River Flood Warning | LOT | 11 hr |
| Jun 17, 6:06 PM CDT | River Flood Warning | LOT | 27 hr |
| Jun 21, 8:43 PM CDT | River Flood Warning | LOT | 33 hr |
| Jun 21, 8:43 PM CDT | River Flood Warning | LOT | 33 hr |
| Jun 24, 10:56 PM CDT | River Flood Warning | LOT | 7 hr |
| Jun 25, 3:53 AM CDT | River Flood Warning | LOT | 14 hr |
| Jul 3, 11:39 PM CDT | River Flood Warning | LOT | 67 hr |
| Jul 4, 12:26 AM CDT | River Flood Warning | LOT | 5 hr |
| Jul 4, 7:50 PM CDT | River Flood Warning | LOT | 41 hr |
| Jul 27, 3:09 PM CDT | River Flood Warning | LOT | 11 hr |
| Jul 27, 7:56 PM CDT | River Flood Warning | LOT | 19 hr |
| Aug 1, 2:44 PM CDT | River Flood Warning | LOT | 37 hr |
| Aug 1, 4:50 PM CDT | River Flood Warning | LOT | 18 hr |
| Aug 11, 8:48 PM CDT | River Flood Warning | LOT | 43 hr |
| Aug 14, 8:16 AM CDT | River Flood Warning | LOT | 42 hr |
| Sep 19, 9:05 PM CDT | River Flood Warning | LOT | 17 hr |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive2025
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.