The Flood Warning is extended for the following rivers in Missouri. Illinois. Mississippi River at Chester. Meramec River near Arnold. . The Flood Warning continues for the following rivers in Missouri. Illinois. Mississippi River at Canton. Mississippi River at Winfield. Mississippi River at Saverton. Mississippi River at Hannibal. Mississippi River at Louisiana. Mississippi River at Clarksville. Mississippi River at Lock & Dam 21. Mississippi River at Quincy. Mississippi River at LaGrange. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT. Minor flooding is forecast. * WHERE. Meramec River near Arnold. * WHEN. From Friday afternoon until further notice. * IMPACTS. At 25.1 feet, St. Louis County closes the following roads at this height: Butler Hill west of Summerhedge Place, Meramec Bottom Road between Hageman Road and Highway 21, Hawkins Road south of Meramec Bottom Road, and Old Telegraph Road at Earl Widman County Park. * ADDITIONAL DETAILS. - At 9:30 PM CDT Sunday the stage was 19.9 feet. - Forecast. The river is expected to rise above flood stage early Friday afternoon and continue rising to 25.0 feet Saturday evening. Additional rises are possible thereafter. - Flood stage is 24.0 feet.