...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 forecast. * WHERE...Thorn Creek from Near Glenwood downstream to confluence with Little Calumet River, including the Thornton gauge. * WHEN...Until late this evening. * IMPACTS...At 11.0 feet, 187th Street threatened in Glenwood. * ADDITIONAL DETAILS... - At 12:45 AM CST Saturday the stage was 8.8 feet. - Forecast...The river is expected to rise above flood stage early this morning to a crest of 10.1 feet this morning. It will then fall below flood stage late this afternoon. - Flood stage is 9.0 feet. - http://www.weather.gov/safety/flood