...The National Weather Service in Springfield MO has issued a Flood Watch for the following rivers in Missouri... Little Osage River near Horton affecting Vernon County. Osage River at Taberville affecting St. Clair zone. For the Little Osage River...including Horton...flooding is possible. For the Osage River...including Taberville...flooding is possible. * WHAT...Flooding is possible. * WHERE...Osage River at Taberville. * WHEN...From late Tuesday night until further notice. * IMPACTS.