Illinois Flood Warning | Effective 04/20/2026 09:22

Headline: 
Flood Warning issued April 20 at 11:22AM CDT by NWS Lincoln IL
Event: 
Flood Warning
Urgency: 
Expected
Effective: 
April 20, 2026 - 9:22am
Expires: 
April 21, 2026 - 1:30am
Description: 
...Forecast flooding changed from Minor to Moderate severity for the following rivers in Illinois... Illinois River near Havana affecting Cass, Fulton and Mason Counties. .The following forecasts are based on observed precipitation, soil moisture conditions, and forecast precipitation. * WHAT...Minor flooding is occurring and moderate flooding is forecast. * WHERE...Illinois River near Havana. * WHEN...Until further notice. * IMPACTS...At 14.0 feet, Minor flooding begins to agricultural areas not protected by levees. * ADDITIONAL DETAILS... - At 10:45 AM CDT Monday the stage was 16.2 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:45 AM CDT Monday was 16.2 feet. - Forecast...The river is expected to rise to a crest of 17.0 feet Thursday morning. - Flood stage is 14.0 feet.
Instruction: 
Persons with interests along this river need to remain aware of the latest forecasts and associated flood risk for their area. Stay tuned for further updates on this flooding situation. Additional information is available at www.weather.gov.
Area Description: 
Cass, IL; Fulton, IL; Mason, IL
Forcast Office: 
NWS Lincoln IL
Sender: 
w-nws.webmaster@noaa.gov