Illinois Severe Flood Warning | Effective 06/18/2026 18:54

Headline: 
Flood Warning issued June 18 at 8:54PM CDT by NWS St Louis MO
Event: 
Flood Warning
Urgency: 
Immediate
Effective: 
June 18, 2026 - 6:54pm
Expires: 
June 20, 2026 - 7:00am
Description: 
...The Flood Warning is extended for the following river in Illinois... Illinois River at La Grange LD. Illinois River at Meredosia. Illinois River at Valley City. Illinois River at Hardin. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is forecast. * WHERE...Illinois River at La Grange LD. * WHEN...From Friday morning until further notice. * IMPACTS...At 24.0 feet, Extensive wetland acreage south of La Grange begins flooding. * ADDITIONAL DETAILS... - At 8:00 PM CDT Thursday the stage was 22.6 feet. - Forecast...The river is expected to rise above flood stage Friday morning and crest near 24.7 feet Tuesday afternoon. - Flood stage is 23.0 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: 
Brown, IL
Forcast Office: 
NWS St Louis MO