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Flash Flood — St. Louis, MO

Aug 12, 2019

Flood Cause
Heavy Rain

Elevated convection developed in response to low level moisture convergence just north of a slowly retreating warm front. With very high precipitable water values in excess of 2 inches, this created very heavy rainfall rates as the storms trained over the same locations for over 5 hours. This caused flash flooding in a number of locations.

Source: NOAA National Weather Service Storm Events Database (event 851059). Narrative written by NWS staff at the time of the event.

Flood Risk Context for St. Louis, MO

This event is one of many recorded floods in St. Louis County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

View St. Louis County flood data →

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