Illinois, Missouri Flood Warning | Effective 04/27/2026 11:35

Headline: 
Flood Warning issued April 27 at 1:35PM CDT until May 5 at 3:00PM CDT by NWS St Louis MO
Event: 
Flood Warning
Urgency: 
Immediate
Effective: 
April 27, 2026 - 11:35am
Expires: 
April 28, 2026 - 11:45pm
Description: 
...The Flood Warning is extended for the following rivers in Illinois...Missouri... Mississippi River at Grafton. Mississippi River at Canton. Mississippi River at Saverton. ...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Winfield. Mississippi River at Clarksville. Mississippi River at Hannibal. Mississippi River at Louisiana. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Mississippi River at Clarksville. * WHEN...Until Tuesday, May 05. * IMPACTS...At 27.2 feet, Silo Park just northwest of Clarksville off Highway 79 begins flooding. * ADDITIONAL DETAILS... - At 1:00 PM CDT Monday the stage was 28.3 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 1:00 PM CDT Monday was 28.3 feet. - Forecast...The river is expected to rise to a crest of 28.6 feet early Wednesday morning. It will then fall below flood stage Monday, May 04. - Flood stage is 25.0 feet.
Instruction: 
Motorists should not attempt to drive around barricades or drive cars through flooded areas. Rainfall heavier than forecast could cause river levels to rise even higher than predicted. The National Weather Service will monitor this developing situation and issue follow up statements as conditions change. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx
Area Description: 
Calhoun, IL; Pike, MO
Forcast Office: 
NWS St Louis MO
Sender: 
w-nws.webmaster@noaa.gov