Active AlertsJefferson

At 1111 AM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 2 and 4 inches of rain have fallen. Additional rainfall amounts of 1 to 3 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly.
Hazard: Flash flooding caused by thunderstorms.
Source: Radar indicated.
Impact: Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. Some locations that will experience flash flooding include O'Fallon, St. Charles, St. Peters, Florissant, Chesterfield, Wildwood, Ballwin, Kirkwood, Maryland Heights, Hazelwood, Manchester, Creve Coeur, Overland, St. Ann, Bridgeton, Dardenne Prairie and Town and Country. This includes the following State Park
S: Babler Memorial State Park, Route 66 State Park, Castlewood State Park, First Missouri State Capitol Historic Site and Robertsville State Park. This includes the following highway
S: Interstate 70 in Missouri between exits 219 and 231. Interstate 44 in Missouri between exits 247 and 276.

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.