Illinois Flood Warning | Effective 04/16/2026 19:02

Headline: 
Flood Warning issued April 16 at 9:02PM CDT until April 17 at 7:00PM CDT by NWS Chicago IL
Event: 
Flood Warning
Urgency: 
Immediate
Effective: 
April 16, 2026 - 7:02pm
Expires: 
April 17, 2026 - 1:15pm
Description: 
...The Flood Warning continues for the following rivers in Illinois... Kishwaukee River near Perryville affecting Winnebago County. Kishwaukee River at Belvidere affecting Boone and Winnebago Counties. For the Kishwaukee River...including Belvidere, Perryville...Minor flooding is forecast. * WHAT...Minor flooding is forecast. * WHERE...Kishwaukee River from County Line Road downstream to confluence with South Branch Kishwaukee River, including the Belvidere gauge. * WHEN...Until Friday evening. * IMPACTS...At 9.0 feet, Boone-McHenry County Line Road threatened. Low-lying areas are threatened in Belvidere Park. * ADDITIONAL DETAILS... - At 8:30 PM CDT Thursday the stage was 9.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:30 PM CDT Thursday was 9.0 feet. - Forecast...The river will remain near flood stage through Friday evening and then is expected to slowly fall. - Flood stage is 9.0 feet. - http://www.weather.gov/safety/flood
Instruction: 
A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation 24 hours into the future. Changes to the rainfall forecast, or any additional rainfall after 24 hours, may cause changes to these river forecasts. Additional information is available at www.weather.gov. The next statement will be issued by Friday afternoon.
Area Description: 
Boone, IL; Winnebago, IL
Forcast Office: 
NWS Chicago IL
Sender: 
w-nws.webmaster@noaa.gov