Illinois, Missouri Flood Warning | Effective 05/01/2026 11:17

Headline: 
Flood Warning issued May 1 at 1:17PM CDT until May 6 at 8:42PM CDT by NWS St Louis MO
Event: 
Flood Warning
Urgency: 
Immediate
Effective: 
May 1, 2026 - 11:17am
Expires: 
May 2, 2026 - 11:30pm
Description: 
...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Alton. Mississippi River at Saverton. Mississippi River at Winfield. Mississippi River at Hannibal. Mississippi River at Clarksville. Mississippi River at Louisiana. ...The Flood Warning is extended for the following rivers in Illinois...Missouri... Mississippi River near Herculaneum. Mississippi River at Mel Price LD. Mississippi River at Chester. Mississippi River at Grafton. 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 Chester. * WHEN...Until Wednesday evening. * IMPACTS...At 31.5 feet, In Perry County, Highway E is closed between County Road 322 and Levee Road (County Road 354) at Bois Brule Creek. * ADDITIONAL DETAILS... - At 1:00 PM CDT Friday the stage was 31.2 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 1:00 PM CDT Friday was 31.2 feet. - Forecast...The river is expected to rise to a crest of 32.0 feet early tomorrow afternoon. It will then fall below flood stage early Tuesday afternoon. - Flood stage is 27.0 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: 
Jackson, IL; Randolph, IL; Perry, MO; Ste. Genevieve, MO
Forcast Office: 
NWS St Louis MO
Sender: 
w-nws.webmaster@noaa.gov