Illinois Severe Flood Warning | Effective 06/22/2026 07:53

Headline: 
Flood Warning issued June 22 at 9:53AM CDT until June 23 at 7:32AM CDT by NWS Chicago IL
Event: 
Flood Warning
Urgency: 
Immediate
Effective: 
June 22, 2026 - 7:53am
Expires: 
June 23, 2026 - 2:00am
Description: 
...The Flood Warning is extended for the following rivers in Illinois... Thorn Creek at Thornton affecting Cook County. ...The Flood Warning continues for the following rivers in Indiana... Illinois... Little Calumet River at Munster (Hohman Avenue) affecting Lake IN and Cook Counties. * WHAT...Minor flooding is occurring and forecasted to continue. * WHERE...Thorn Creek from Near Glenwood downstream to confluence with Little Calumet River, including the Thornton gauge. * WHEN...Until tomorrow morning. * IMPACTS...At 12.0 feet, Structures threatened along Glenwood Thornton Road north of Glenwood. * ADDITIONAL DETAILS... - At 9:30 AM CDT Monday the stage was 11.4 feet. - Forecast...The river is expected to rise to a crest of 12.0 feet this afternoon before falling below flood stage tonight. - Flood stage is 9.0 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 late tonight.
Area Description: 
Cook, IL
Forcast Office: 
NWS Chicago IL