ST. LOUIS – It’s been a soggy last several days across the St. Louis region, and there’s at least one more round of heavy rainfall expected this weekend, most of Saturday into Sunday.
How much rain did the St. Louis region see on Friday? Here’s a look at some 24-hour totals (reported around 8 a.m. Saturday) by the National Weather Service:
- Mt. Vernon, Illinois (7.3 inches)
- Farmington, Missouri (6.25 inches)
- Granite City, Illinois (4.84 inches)
- Chesterfield, Missouri (4.25 inches)
- Alton, Illinois (4.20 inches)
- Farmington, Missouri (3.92 inches)
- Ferguson, Missouri (3.80 inches)
- Lambert Airport – St. Louis’ flagship station (3.53 inches)
- Cahokia, Illinois (2.48 inches)
- Washington, Missouri (2.38 inches)
- Potosi, Missouri (2.38 inches)
For context, the average observed rainfall precipitation for St. Louis in April is roughly 4.7 inches, per NWS climatology data. So many communities already exceeded or pushed that average with Friday’s rainfall alone.
How much more is in the forecast?
Radar projections from FOX 2 meteorologists estimate:
- Another half inch for St. Charles, Lincoln and Warren counties.
- Another half inch to inch for St. Louis County, St. Louis City, Franklin County, Jefferson County and much of the Metro East.
- Another inch to two inches for communities south of the immediate Greater St. Louis Metropolitan Area, possibly beginning at St. Francois County.
Much of St. Louis remains under a flash flood watch while parts of Dent, Jefferson, Perry and Phelps counties are under a flash flood warning. If upgraded to a warning, take action to avoid low-lying or flood-prone areas. And if a roadway is flooded, turn around and find an alternate route.
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