Illinois Severe Flood Warning | Effective 06/20/2026 17:14

Headline: 
Flood Warning issued June 20 at 7:14PM CDT until June 26 at 7:00AM CDT by NWS Lincoln IL
Event: 
Flood Warning
Urgency: 
Expected
Effective: 
June 20, 2026 - 5:14pm
Expires: 
June 21, 2026 - 9:15am
Description: 
...The National Weather Service in Lincoln IL has issued a Flood Warning for the following rivers in Illinois... Sangamon River near Chandlerville affecting Mason and Cass Counties. .The following forecasts are based on observed precipitation, soil moisture conditions, and forecast precipitation. * WHAT...Minor flooding is forecast. * WHERE...Sangamon River near Chandlerville. * WHEN...From late Monday night to Friday morning. * ADDITIONAL DETAILS... - At 7:00 PM CDT Saturday the stage was 455.1 feet. - Forecast...The river is expected to rise above flood stage early Tuesday morning to a crest of 457.4 feet early Wednesday morning. It will then fall below flood stage early Friday morning. - Flood stage is 456.6 feet. - http://www.weather.gov/safety/flood
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; Mason, IL
Forcast Office: 
NWS Lincoln IL