7/21/2025 2:03:00 AM until 7/21/2025 3:30:00 AM

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Be aware of your surroundings and do not drive on flooded roads.

At 203 AM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 2 inches of rain have fallen. The expected rainfall rate is 1 to 2 inches in 1 hour. Additional rainfall amounts of 1 to 2 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, Chesterfield, Wildwood, Wentzville, Maryland Heights, Hazelwood, Lake St. Louis, Bridgeton, Dardenne Prairie, Troy, Weldon Spring, Cottleville, St. Paul, Moscow Mills, Winfield, Davis, Grafton and Hawk Point. This includes the following State Parks... Cuivre River State Park and First Missouri State Capitol Historic Site. This includes Interstate 70 in Missouri between exits 203 and 229.