Illinois Severe Flood Warning | Effective 06/18/2026 18:49

Headline: 
Flood Warning issued June 18 at 8:49PM CDT until June 22 at 8:30AM CDT by NWS Lincoln IL
Event: 
Flood Warning
Urgency: 
Immediate
Effective: 
June 18, 2026 - 6:49pm
Expires: 
June 19, 2026 - 11:00am
Description: 
...The Flood Warning is extended for the following rivers in Illinois... Sangamon River at Monticello affecting Piatt County. .The following forecasts are based on observed precipitation, soil moisture conditions, and forecast precipitation. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Sangamon River at Monticello. * WHEN...Until Monday morning. * IMPACTS...At 13.0 feet, Flooding of agricultural areas begins. * ADDITIONAL DETAILS... - At 8:00 PM CDT Thursday the stage was 13.4 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:00 PM CDT Thursday was 13.4 feet. - Forecast...The river is expected to rise to a crest of 14.6 feet early Saturday morning. It will then fall below flood stage early Monday morning. - Flood stage is 13.0 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: 
Piatt, IL
Forcast Office: 
NWS Lincoln IL