Active Weather Alerts
River Flood Warning
Issued: 2:38 AM Apr. 30, 2026 – National Weather Service
...FLOOD WARNING NOW IN EFFECT UNTIL SUNDAY EVENING... * WHAT...Minor flooding is forecast. * WHERE...Mississippi River near Herculaneum. * WHEN...Until Sunday evening. * IMPACTS...At 28.3 feet, Near this height, the walking trail (extension of Station Road) at Bates Memorial Park begins flooding. * ADDITIONAL DETAILS... - At 8:30 PM CDT Wednesday the stage was 25.7 feet and rising. - Forecast...The river is expected to rise above flood stage just after midnight tonight to a crest of 27.6 feet early Friday morning. It will then fall below flood stage Saturday afternoon. - Flood stage is 26.0 feet. && All Times CDT Fld Observed Forecasts (7:00 am) Location Stg Stage Fri Sat Sun Mon Tue Mississippi River Herculaneum 26.0 25.7 27.6 26.8 24.7 22.0 18.8 &&
River Flood Warning
Issued: 1:12 AM Apr. 30, 2026 – National Weather Service
...FLOOD WARNING NOW IN EFFECT UNTIL TUESDAY MORNING... * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Meramec River near Arnold. * WHEN...Until Tuesday morning. * IMPACTS...At 27.0 feet, Meramec Bottom Road between Wells Road and Kerth Road begins flooding near this height. * ADDITIONAL DETAILS... - At 7:30 PM CDT Wednesday the stage was 25.9 feet and rising. - Recent Activity...The river rose above flood stage early in the morning on April 29. - Forecast...The river is expected to rise to a crest of 28.4 feet Friday morning. It will then fall below flood stage early Monday morning. - Flood stage is 24.0 feet. && All Times CDT Fld Observed Forecasts (7:00 am) Location Stg Stage Fri Sat Sun Mon Tue Meramec River Arnold 24.0 25.9 28.4 28.0 26.3 23.7 20.6 &&
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