Illinois Flood Warning | Effective 04/17/2026 20:57

Headline: 
Flood Warning issued April 17 at 10:57PM CDT by NWS Chicago IL
Event: 
Flood Warning
Urgency: 
Immediate
Effective: 
April 17, 2026 - 8:57pm
Expires: 
April 18, 2026 - 3:00pm
Description: 
...The Flood Warning continues for the following rivers in Illinois... Rock River at Byron affecting Ogle County. Rock River at Rockton affecting Winnebago County. Rock River at Latham Park affecting Winnebago County. * WHAT...Minor flooding is occurring and moderate flooding is forecast. * WHERE...Rock River from Swanson Road in Roscoe downstream to Shorewood Park in Loves Park, including the Latham Park gauge. * WHEN...Until further notice. * IMPACTS...At 11.5 feet, Queen Oaks Drive is threatened in Machesney Park. Lower-level of elevated structures threatened along Harbor Lights Court west of Machesney Park. Ritter Drive is threatened north of Baldwin Drive in Machesney Park. At 12.0 feet, Low-lying sections of Shorewood Park are inundated in Loves Park. At 12.5 feet, Residences threatened along Harbor Oaks Drive north of Machesney Park. Numerous residences are threatened near the river and Shore Drive. Low-lying sections of Rockford Country Club are inundated. * ADDITIONAL DETAILS... - At 9:30 PM CDT Friday the stage was 9.6 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:30 PM CDT Friday was 9.6 feet. - Forecast...The river is expected to crest near 13 feet on Monday based upon the latest rainfall estimates. - Flood stage is 9.0 feet. - Flood History...This crest compares to a previous crest of 12.8 feet on 02/26/2018. - 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 Saturday afternoon.
Area Description: 
Winnebago, IL
Forcast Office: 
NWS Chicago IL
Sender: 
w-nws.webmaster@noaa.gov