Flood Watch

Locations Affected

Saint Louis, MO ∙ Columbia, MO ∙ O'Fallon, MO ∙ Saint Charles, MO ∙ Saint Peters, MO ∙ Florissant, MO ∙ Grantwood Village, MO ∙ Bellerive, MO ∙ Pine Lawn, MO ∙ Huntsdale, MO

Full Alert Message

Flood Watch National Weather Service St Louis MO 329 AM CDT Fri Apr 18 2025 ...FLOOD WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH SUNDAY EVENING... * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Illinois, including the following areas, Bond IL, Calhoun IL, Clinton IL, Fayette IL, Greene IL, Jersey IL, Macoupin IL, Madison IL, Marion IL, Monroe IL, Montgomery IL, Randolph IL, Saint Clair IL and Washington IL and Missouri, including the following areas, Audrain MO, Boone MO, Callaway MO, Cole MO, Crawford MO, Franklin MO, Gasconade MO, Iron MO, Jefferson MO, Lincoln MO, Madison MO, Moniteau MO, Montgomery MO, Osage MO, Pike MO, Reynolds MO, Saint Charles MO, Saint Francois MO, Saint Louis City MO, Saint Louis MO, Sainte Genevieve MO, Warren MO and Washington MO. * WHEN...From this evening through Sunday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Several rounds of showers and thunderstorms are likely Friday night through Sunday. Rainfall totals of 2-4 inches are likely across much of the region with localized amounts up to 5 inches. Highest rainfall totals are expected along and north of the I-44 corridor. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

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