Illinois Severe Flood Warning | Effective 06/21/2026 09:18

Headline: 
Flood Warning issued June 21 at 11:18AM CDT by NWS Chicago IL
Event: 
Flood Warning
Urgency: 
Immediate
Effective: 
June 21, 2026 - 9:18am
Expires: 
June 21, 2026 - 9:15pm
Description: 
...The Flood Warning is extended for the following rivers in Illinois... Illinois River at La Salle affecting Putnam, La Salle and Bureau 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 further notice. * 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 10:45 AM CDT Sunday the stage was 20.8 feet. - Forecast...The river is expected to rise to a crest of 22.6 feet early Wednesday morning. It will then gradually fall through the end of the week. - 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