Illinois Flood Warning | Effective 04/17/2026 08:47

Headline: 
Flood Warning issued April 17 at 10:47AM CDT by NWS Chicago IL
Event: 
Flood Warning
Urgency: 
Immediate
Effective: 
April 17, 2026 - 8:47am
Expires: 
April 18, 2026 - 3:00am
Description: 
...The Flood Warning is extended for the following rivers in Illinois... Rock River at Byron affecting Ogle County. ...The Flood Warning continues for the following rivers in Illinois... Rock River at Rockton affecting Winnebago County. Rock River at Latham Park affecting Winnebago County. * WHAT...Moderate flooding is forecast. * WHERE...Rock River from Confluence with Kishwaukee River to Castle Rock State Park near Oregon, including the Byron gauge. * WHEN...Until further notice. * IMPACTS...At 13.5 feet, Numerous low-lying structures downstream of Byron are flooded. * ADDITIONAL DETAILS... - At 10:15 AM CDT Friday the stage was 13.0 feet. - Recent Activity...The river climbed to flood stage overnight into this morning. - Forecast...The river is expected to crest near 14.0 feet on Sunday. - Flood stage is 13.0 feet. - Flood History...This crest compares to a previous crest of 13.8 feet on 07/16/2024. - 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 late tonight.
Area Description: 
Ogle, IL
Forcast Office: 
NWS Chicago IL
Sender: 
w-nws.webmaster@noaa.gov