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.

The National Weather Service in Chicago IL has issued a Flood Warning for the following rivers in Illinois... Thorn Creek at Thornton affecting Cook County. For the Thorn Creek...including Thornton...Minor flooding is forecast. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Thorn Creek from Near Glenwood downstream to confluence with Little Calumet River, including the Thornton gauge. * WHEN...From this morning to early Wednesday morning. * IMPACTS...At 11.5 feet, Glenwood Thornton Road threatened north of Glenwood. * ADDITIONAL DETAILS... - At 7:45 AM CDT Monday the stage was 9.3 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 7:45 AM CDT Monday was 9.3 feet. - Forecast...The river is expected to rise to a crest of 11.5 feet this evening. It will then fall below flood stage late tomorrow evening. - Flood stage is 9.0 feet. - http://www.weather.gov/safety/flood