Event narrative (NOAA)
Up to 13 inches of rain fell in a 6 to 10 hour period causing widespread flash flooding. The axis of heaviest rain extended from just north of Wentzville east southeastward through northern portions of O'Fallon through St. Peters and into St. Charles. Numerous roads were flooded throughout St. Charles County. Interstate 70 was flooded with up to five feet of water around the intersection with Mid Rivers Mall Drive. Fire and rescue searched and cleared several dozen vehicles in this area and rescued 8 people from the rising waters. Also, in the area of Harry S. Truman Blvd and Premier Parkway, several drivers were rescued from their flooded vehicles. In the area of Mexico Road and Spencer Road, multiple vehicles were trapped by rapidly rising waters of Spencer Creek. One vehicle in this are
Other notable flash flood events in Missouri
Source: NOAA/NCEI Storm Events Database. Deaths and injuries are those NOAA classifies as direct. Damage is the reporting office's estimate at the time and is not inflation-adjusted. This is a catalogue record, not a forecast.