Missouri Flood Warning | Effective 04/20/2026 19:03

Headline: 
Flood Warning issued April 20 at 9:03PM CDT until April 23 at 7:00PM CDT by NWS St Louis MO
Event: 
Flood Warning
Urgency: 
Immediate
Effective: 
April 20, 2026 - 7:03pm
Expires: 
April 22, 2026 - 7:15am
Description: 
...The Flood Warning continues for the following rivers in Missouri... Meramec River near Arnold. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is forecast. * WHERE...Meramec River near Arnold. * WHEN...From late tonight to Thursday evening. * IMPACTS...At 24.7 feet, Hawkins Road south of Meramec Bottom Road begins flooding. * ADDITIONAL DETAILS... - At 8:30 PM CDT Monday the stage was 23.5 feet. - Forecast...The river is expected to rise above flood stage just after midnight tonight to a crest of 24.8 feet tomorrow evening. It will then fall below flood stage early Wednesday afternoon. - Flood stage is 24.0 feet.
Instruction: 
Motorists should not attempt to drive around barricades or drive cars through flooded areas. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx
Area Description: 
Jefferson, MO; St. Louis, MO
Forcast Office: 
NWS St Louis MO