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Lanark, IL Warnings, Watches and Advisories

NWS Active Alerts for IL - Map View

State: IL Total alerts: 6 Updated: Sep 25, 2026 2:45pm CDT

Flood Warning

Area
Pike, IL; Marion, MO
Flood Warning issued September 25 at 12:14PM CDT until September 28 at 1:00AM CDT by NWS St Louis MO

...The Flood Warning is extended for the following rivers in Illinois...Missouri... Mississippi River at Louisiana. Mississippi River at Hannibal. ...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Clarksville. ...The Flood Warning is cancelled for the following rivers in Illinois...Missouri... Mississippi River at Saverton. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is forecast. * WHERE...Mississippi River at Hannibal. * WHEN...Until late Sunday night. * IMPACTS...At 17.0 feet, John Hay Recreation Area on east side (inside the Illinois Sny Levee) begins flooding. * ADDITIONAL DETAILS... - At 11:15 AM CDT Friday the stage was 17.0 feet. - Forecast...The river is expected to rise above flood stage this afternoon to a crest of 17.1 feet just after midnight tonight. It will then fall below flood stage tomorrow evening. - Flood stage is 17.0 feet.

Flood Warning

Area
Pike, IL; Pike, MO
Flood Warning issued September 25 at 12:14PM CDT until September 29 at 5:00AM CDT by NWS St Louis MO

...The Flood Warning is extended for the following rivers in Illinois...Missouri... Mississippi River at Louisiana. Mississippi River at Hannibal. ...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Clarksville. ...The Flood Warning is cancelled for the following rivers in Illinois...Missouri... Mississippi River at Saverton. 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 Louisiana. * WHEN...Until late Monday night. * IMPACTS...At 15.0 feet, The first quarter mile of Edison Avenue beyond the railroad tracks begins flooding near this height. * ADDITIONAL DETAILS... - At 12:00 PM CDT Friday the stage was 15.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 12:00 PM CDT Friday was 15.5 feet. - Forecast...The river is expected to rise to a crest of 15.7 feet tomorrow morning. It will then fall below flood stage late Sunday evening. - Flood stage is 15.0 feet.

Flood Warning

Area
Calhoun, IL; Pike, MO
Flood Warning issued September 25 at 12:14PM CDT until September 29 at 7:00AM CDT by NWS St Louis MO

...The Flood Warning is extended for the following rivers in Illinois...Missouri... Mississippi River at Louisiana. Mississippi River at Hannibal. ...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Clarksville. ...The Flood Warning is cancelled for the following rivers in Illinois...Missouri... Mississippi River at Saverton. 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 morning. * IMPACTS...At 25.5 feet, State Route P east of Elsberry begins flooding just east of the levee. * ADDITIONAL DETAILS... - At 12:00 PM CDT Friday the stage was 25.2 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 12:00 PM CDT Friday was 25.3 feet. - Forecast...The river is expected to rise to a crest of 25.7 feet tomorrow morning. It will then fall below flood stage early Monday morning. - Flood stage is 25.0 feet.

Flood Warning

Area
Lake, IL; Kenosha, WI
Flood Warning issued September 25 at 9:23AM CDT until September 25 at 4:00PM CDT by NWS Milwaukee/Sullivan WI

...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Fox River Lower Near New Munster affecting Lake and Kenosha Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Fox River Lower near New Munster. * WHEN...Until this afternoon. * IMPACTS...At 11.0 feet, Floodwaters begin to affect 77th St. in the Town of Wheatland. Floodwaters are near some homes along Riverside Dr, Shorewood Dr, and Highway W in the Village of Salem Lakes and Town of Wheatland areas. Fox River Park boat launch starts to flood. * ADDITIONAL DETAILS... - At 9:00 AM CDT Friday the stage was 11.1 feet. - Bankfull stage is 10.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 AM CDT Friday was 11.7 feet. - Forecast...The river is expected to fall below flood stage this afternoon and continue falling to 8.3 feet Friday, October 02. - Flood stage is 11.0 feet. - Flood History...This crest compares to a previous crest of 11.3 feet on 03/30/2020. - http://www.weather.gov/safety/flood

Flood Warning

Area
Lake, IL
Flood Warning issued September 25 at 9:14AM CDT until September 28 at 1:00AM CDT by NWS Chicago IL

...The Flood Warning continues for the following rivers in Illinois... Des Plaines River near Russell affecting Lake IL County. Des Plaines River near Gurnee affecting Lake IL County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Des Plaines River from US-41 in Gurnee downstream to Townline Road in Vernon Hills, including the Gurnee gauge. * WHEN...Until late Sunday night. * IMPACTS...At 9.0 feet, Kilbourne Road and Emerald Avenue threatened near Grand Avenue in Gurnee. * ADDITIONAL DETAILS... - At 8:30 AM CDT Friday the stage was 8.3 feet. - Forecast...The river is expected to fall below flood stage by Sunday night. - Flood stage is 7.0 feet. - http://www.weather.gov/safety/flood

Flood Warning

Area
Lake, IL
Flood Warning issued September 25 at 9:14AM CDT until September 30 at 7:00PM CDT by NWS Chicago IL

...The Flood Warning continues for the following rivers in Illinois... Des Plaines River near Russell affecting Lake IL County. Des Plaines River near Gurnee affecting Lake IL County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Des Plaines River from IL/WI state line downstream to US-41 in Gurnee, including the Russell gauge. * WHEN...Until Wednesday evening. * IMPACTS...At 9.5 feet, Residential structures threatened along Russell Road between the river and Kilbourne Road. Industrial parking lots threatened along Kilbourne Road. * ADDITIONAL DETAILS... - At 8:30 AM CDT Friday the stage was 8.8 feet. - Forecast...The river is expected to fall below flood stage by the middle of next week. - Flood stage is 7.0 feet. - http://www.weather.gov/safety/flood

SAFETY and DATA MESSAGE

When a severe thunderstorm warning is issued, the storm may produce damaging winds, large hail, dangerous lightning, and heavy rain. In some cases, heavy rainfall produced by a severe storm can also lead to flash flooding. Do not drive vehicles through flooded areas. The water depth or fast flowing water/mud/debris from a flash flood will make road conditions unsafe. Do not rely soley on data presented here or other third-party websites - always check your official national and local weather service agency website, socials, radio and/or TV stations for making critical decisions related to weather events.

Please carefully read each posted Warning and Alert as it relates to the area(s) being affected. We may provide a wider range of issued severe weather warnings for surrounding cities and counties, so some alerts may not directly impact this location. This is done to help with preparing for severe weather that may overlap or be heading towards Lanark.

Use the Radar Maps link provided to understand the trajectory of a storm.

For more official information about severe storms and how to stay safe, visit the National Weather Service's Severe Thunderstorm Safety page. We encourage you to also monitor Excessive Rainfall Forecasts on their Weather Prediction Center website.

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