The National Weather Service in St Louis has issued a Flood Warning for the following rivers in Illinois. Missouri. Mississippi River at Clarksville. Mississippi River at Louisiana. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT. Minor flooding is forecast. * WHERE. Mississippi River at Louisiana. * WHEN. From Sunday afternoon to Sunday, July 20. * IMPACTS. At 17.0 feet, The parking area at the boat house floods. * ADDITIONAL DETAILS. - At 2:30 PM CDT Saturday the stage was 14.2 feet. - Forecast. The river is expected to rise above flood stage early tomorrow afternoon to a crest of 16.1 feet early Tuesday morning. It will then fall below flood stage Saturday, July 19. - Flood stage is 15.0 feet.