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Flash Flood — St. Clair, MO

Jul 31, 2020

A cold front moved into the region on the 26th and meandered across the region through the 31st before an unseasonably strong upper level low pressure system moved east of the region. A very moist airmass and slow movement of the upper level system led to periods of very heavy rainfall each day. The most notable heavy rain event occurred across St. Clair County between Osceola and Lowry City. Over 7 inches of rain fell in a period of a few hours during the early morning of the 31st and led to fl

Source: NOAA National Weather Service Storm Events Database (event 912838). Narrative written by NWS staff at the time of the event.

Flood Risk Context for St. Clair, MO

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

View St. Clair County flood data →

More Flood Stories

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St. Clair, MO · Jul 25, 2001

Excessive rainfall of three to five inches fell over northern and eastern portions of St. Clair County between 6 and 9 am. Occupants of a minivan went across a low water crossing that was already flooded.

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Flash Flood$25K damage

St. Clair, MO · Jul 31, 2020

A cold front moved into the region on the 26th and meandered across the region through the 31st before an unseasonably strong upper level low pressure system moved east of the region.

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Flash Flood$200K damage

St. Clair, MO · Jun 14, 2001

Over six inches of rain fell in southeastern St. Clair County washing out roads and flooding local landscape. Whole sections of roadways were eroded away by the rain which overflowed river and creek banks throughout the county.

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Flash Flood$10K damage

St. Clair, MO · May 15, 2010

Severe thunderstorms associated with a cold pool from an upper level low developed during the early morning hours of May 13th. The storms produced hail, winds up to 60 mph, flooding and three confirmed tornadoes.

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