Illinois, Missouri Severe Flood Warning | Effective 06/22/2026 20:12

Headline: 
Flood Warning issued June 22 at 10:12PM CDT until June 26 at 1:00AM CDT by NWS St Louis MO
Event: 
Flood Warning
Urgency: 
Immediate
Effective: 
June 22, 2026 - 8:12pm
Expires: 
June 24, 2026 - 8:15am
Description: 
...The Flood Warning is extended for the following rivers in Illinois...Missouri... Mississippi River at Clarksville. 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 late Thursday night. * IMPACTS...At 25.3 feet, The road to Port Marmac, a riverside community of about 13 homes just south of Clarksville, begins flooding. * ADDITIONAL DETAILS... - At 10:00 PM CDT Monday the stage was 25.2 feet and nearing a crest. - Recent Activity...The river rose above flood stage this morning and is near a crest. - Forecast...The river is expected to crest near 25.3 feet just after midnight tonight. It will then fall below flood stage Wednesday evening. - Flood stage is 25.0 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: 
Calhoun, IL; Pike, MO
Forcast Office: 
NWS St Louis MO