Illinois Severe Flood Warning | Effective 06/18/2026 08:26

Headline: 
Flood Warning issued June 18 at 10:26AM CDT until June 23 at 1:00PM CDT by NWS Chicago IL
Event: 
Flood Warning
Urgency: 
Immediate
Effective: 
June 18, 2026 - 8:26am
Expires: 
June 18, 2026 - 8:00pm
Description: 
...The Flood Warning continues for the following rivers in Illinois... Illinois River at La Salle affecting Bureau, Putnam and La Salle Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Illinois River from Starved Rock Lock and Dam downstream to confluence with Big Bureau Creek, including the La Salle gauge. * WHEN...Until early Tuesday afternoon. * IMPACTS...At 22.0 feet, Lower parking lot at Starved Rock State Park is inundated east of La Salle. High water levels begin to impact shipping interests along the river. * ADDITIONAL DETAILS... - At 9:45 AM CDT Thursday the stage was 21.4 feet. - Forecast...The river is expected to rise to a crest of 21.9 feet early Friday afternoon. It will then fall below flood stage Tuesday morning. - Flood stage is 20.0 feet. - 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 this evening.
Area Description: 
Bureau, IL; La Salle, IL; Putnam, IL
Forcast Office: 
NWS Chicago IL