Weather Warnings for Illinois

Issued by the National Weather Service

Current watches, warnings, and advisories for Illinois
Alerts Updated: April 10, 2026, 4:13 am  UTC


Flood Warning issued April 9 at 11:12PM CDT by NWS St Louis MO

Summary: ...The Flood Warning continues for the following rivers in Missouri...Illinois... 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 further notice. * IMPACTS...At 25.5 feet, State Route P east of Elsberry begins flooding just east of the levee. * ADDITIONAL DETAILS... - At 11:00 PM CDT Thursday the stage was 25.2 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 11:00 PM CDT Thursday was 25.2 feet. - Forecast...The river is expected to rise to 25.8 feet early Sunday afternoon. Additional rises are possible thereafter. - Flood stage is 25.0 feet.
Severity:  Severe    Effective:  April 9, 2026, 11:12 pm      Expires:  April 11, 2026, 11:15 am
Area:  Calhoun, IL; Pike, MO


Flood Warning issued April 9 at 11:12PM CDT by NWS St Louis MO

Summary: ...The Flood Warning continues for the following rivers in Missouri...Illinois... 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 Louisiana. * WHEN...Until further notice. * IMPACTS...At 15.0 feet, The first quarter mile of Edison Avenue beyond the railroad tracks begins flooding near this height. * ADDITIONAL DETAILS... - At 11:00 PM CDT Thursday the stage was 15.1 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 11:00 PM CDT Thursday was 15.1 feet. - Forecast...The river is expected to rise to 15.7 feet Sunday evening. Additional rises are possible thereafter. - Flood stage is 15.0 feet.
Severity:  Severe    Effective:  April 9, 2026, 11:12 pm      Expires:  April 11, 2026, 11:15 am
Area:  Pike, IL; Pike, MO


Flood Warning issued April 9 at 10:44PM EDT until April 12 at 6:30AM EDT by NWS Indianapolis IN

Summary: ...The Flood Warning is extended for the following river in Indiana... Wabash River at Lafayette. ...The Flood Warning continues for the following river in Indiana... Illinois... Wabash River at Covington, Montezuma, Terre Haute, Hutsonville Legacy Power Plant Site, and Riverton. .Lowland flooding will continue along the Wabash River in western Indiana this week. As of late Thursday evening the crest was between Hutsonville and Riverton. Flooding is expected to end at Lafayette and Covington by late Friday afternoon. Flooding downstream is currently predicted to end by Monday, but rainfall starting Sunday night could bring additional rises to area rivers next week. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Wabash River at Terre Haute. * WHEN...Until Sunday morning. * IMPACTS...At 18.5 feet, Flooding of rural roads is in progress behind Honey Creek Levee as a result of two unrepaired levee breaks. * ADDITIONAL DETAILS... - At 9:30 PM EDT Thursday /8:30 PM CDT Thursday/ the stage was 19.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:30 PM EDT Thursday /8:30 PM CDT Thursday/ was 19.9 feet. - Forecast...The river is expected to fall below flood stage Saturday evening and continue falling and remain below flood stage. - Flood stage is 16.5 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 9, 2026, 10:44 pm      Expires:  April 10, 2026, 5:45 pm
Area:  Clark, IL; Crawford, IL; Sullivan, IN; Vigo, IN


Flood Warning issued April 9 at 10:44PM EDT until April 14 at 2:00AM EDT by NWS Indianapolis IN

Summary: ...The Flood Warning is extended for the following river in Indiana... Wabash River at Lafayette. ...The Flood Warning continues for the following river in Indiana... Illinois... Wabash River at Covington, Montezuma, Terre Haute, Hutsonville Legacy Power Plant Site, and Riverton. .Lowland flooding will continue along the Wabash River in western Indiana this week. As of late Thursday evening the crest was between Hutsonville and Riverton. Flooding is expected to end at Lafayette and Covington by late Friday afternoon. Flooding downstream is currently predicted to end by Monday, but rainfall starting Sunday night could bring additional rises to area rivers next week. * WHAT...Minor flooding is forecast. * WHERE...Wabash River at Hutsonville Legacy Power Plant Site. * WHEN...Until early Tuesday morning. * IMPACTS...At 20.0 feet, Leaverton Park in Palestine and park in Hutsonville begin to flood. Agricultural flooding spreads to higher land. Seep water is noticeable behind levees. Some elevated river cottages are surrounded by water. Several county or township roads east of Lincoln Heritage Trail between Palestine and Hutsonville in Crawford County Illinois are impassable. * ADDITIONAL DETAILS... - There is no current observed data. - Forecast...The river is expected to fall below flood stage early Monday afternoon and continue falling and remain below flood stage. - Flood stage is 16.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 9, 2026, 10:44 pm      Expires:  April 10, 2026, 5:45 pm
Area:  Crawford, IL; Lawrence, IL; Knox, IN; Sullivan, IN


Flood Warning issued April 9 at 10:44PM EDT until April 14 at 4:00AM EDT by NWS Indianapolis IN

Summary: ...The Flood Warning is extended for the following river in Indiana... Wabash River at Lafayette. ...The Flood Warning continues for the following river in Indiana... Illinois... Wabash River at Covington, Montezuma, Terre Haute, Hutsonville Legacy Power Plant Site, and Riverton. .Lowland flooding will continue along the Wabash River in western Indiana this week. As of late Thursday evening the crest was between Hutsonville and Riverton. Flooding is expected to end at Lafayette and Covington by late Friday afternoon. Flooding downstream is currently predicted to end by Monday, but rainfall starting Sunday night could bring additional rises to area rivers next week. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Wabash River at Riverton. * WHEN...Until early Tuesday morning. * IMPACTS...At 18.0 feet, Extensive lowland flooding is in progress. High water surrounds many river cabins. Access to most river cabins is by boat only. Levees begin to protect farmland. Extensive flooding of Leaverton Park occurs in Palestine, Illinois. * ADDITIONAL DETAILS... - At 10:00 PM EDT Thursday /9:00 PM CDT Thursday/ the stage was 18.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:00 PM EDT Thursday /9:00 PM CDT Thursday/ was 18.0 feet. - Forecast...The river is expected to rise to a crest of 18.1 feet just after midnight tonight. It will then fall below flood stage Monday afternoon. - Flood stage is 15.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 9, 2026, 10:44 pm      Expires:  April 10, 2026, 5:45 pm
Area:  Crawford, IL; Lawrence, IL; Knox, IN; Sullivan, IN


Flood Warning issued April 9 at 9:21PM CDT by NWS Chicago IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Illinois River at La Salle affecting La Salle, Putnam and Bureau Counties. For the Illinois River (Upper)...including La Salle...Minor flooding is forecast. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Illinois River from Starved Rock Lock and Dam downstream to confluence with Big Bureau Creek, including the La Salle gauge. * WHEN...Until further notice. * IMPACTS...At 20.0 feet, Agricultural areas in La Salle, Spring Valley, and Peru are inundated. * ADDITIONAL DETAILS... - At 8:45 PM CDT Thursday the stage was 20.2 feet. - Forecast...The river is expected to remain near 20 feet through early next week. - Flood stage is 20.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 9, 2026, 9:21 pm      Expires:  April 10, 2026, 3:30 pm
Area:  Bureau, IL; La Salle, IL; Putnam, IL


Flood Warning issued April 9 at 9:20PM CDT by NWS Lincoln IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Illinois River near Havana affecting Mason, Fulton and Cass Counties. Illinois River at Beardstown affecting Morgan, Brown, Schuyler and Cass Counties. .The following forecasts are based on observed precipitation, soil moisture conditions, and forecast precipitation. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Illinois River at Beardstown. * WHEN...Until further notice. * IMPACTS...At 14.4 feet, Seepage problems begin in the Coal Creek Drainage and Levee District. * ADDITIONAL DETAILS... - At 8:45 PM CDT Thursday the stage was 15.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:45 PM CDT Thursday was 15.0 feet. - Forecast...The river is expected to rise to a crest of 15.1 feet early Saturday afternoon. - Flood stage is 14.0 feet.
Severity:  Severe    Effective:  April 9, 2026, 9:20 pm      Expires:  April 10, 2026, 1:30 pm
Area:  Brown, IL; Cass, IL; Morgan, IL; Schuyler, IL


Flood Warning issued April 9 at 9:20PM CDT by NWS Lincoln IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Illinois River near Havana affecting Mason, Fulton and Cass Counties. Illinois River at Beardstown affecting Morgan, Brown, Schuyler and Cass Counties. .The following forecasts are based on observed precipitation, soil moisture conditions, and forecast precipitation. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Illinois River near Havana. * WHEN...Until further notice. * IMPACTS...At 14.0 feet, Minor flooding begins to agricultural areas not protected by levees. * ADDITIONAL DETAILS... - At 8:45 PM CDT Thursday the stage was 15.8 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:45 PM CDT Thursday was 15.8 feet. - Forecast...The river is expected to rise to a crest of 16.0 feet early Sunday morning. - Flood stage is 14.0 feet.
Severity:  Severe    Effective:  April 9, 2026, 9:20 pm      Expires:  April 10, 2026, 1:30 pm
Area:  Cass, IL; Fulton, IL; Mason, IL


Flood Warning issued April 9 at 9:12PM CDT by NWS Chicago IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Fox River at Algonquin Lock & Dam tailwater affecting Kane, McHenry and Lake IL Counties. For the Fox River (Illinois)...including Algonquin Lock & Dam tailwater...Minor flooding is forecast. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Fox River from Johnsburg downstream to Red Gate Road in St. Charles, including the Algonquin Lock & Dam tailwater gauge. * WHEN...Until further notice. * IMPACTS...At 10.0 feet, Winaki Trail and Onaway Trail are threatened south of Algonquin. Athletic fields inundated at Judson College in Elgin. * ADDITIONAL DETAILS... - At 8:30 PM CDT Thursday the stage was 9.8 feet. - Forecast...The river is expected to slowly rise to just above 10 feet by Friday afternoon and evening before gradually falling into next week. - Flood stage is 9.5 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 9, 2026, 9:12 pm      Expires:  April 10, 2026, 3:15 pm
Area:  Kane, IL; Lake, IL; McHenry, IL


Flood Watch issued April 9 at 9:10PM CDT until April 12 at 1:00AM CDT by NWS Chicago IL

Summary: ...The Flood Watch continues for the following rivers in Illinois... Des Plaines River at Lincolnshire affecting Northern Cook and Lake IL zones. For the Des Plaines River...including Lincolnshire...flooding is possible. * WHAT...Flooding is possible. * WHERE...Des Plaines River from Townline Road in Libertyville downstream to Palatine Road in Prospect Heights, including the Lincolnshire gauge. * WHEN...Until early Sunday morning. * IMPACTS...At 13.0 feet, Low-lying trails in Wright Woods Forest Preserve are inundated. * ADDITIONAL DETAILS... - At 8:45 PM CDT Thursday the stage was 12.3 feet. - Forecast...The river may rise to rise to a crest near flood stage Friday evening or Saturday morning after additional rainfall tonight. - Flood stage is 12.5 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 9, 2026, 9:10 pm      Expires:  April 10, 2026, 3:15 pm
Area:  Lake; Northern Cook


Flood Warning issued April 9 at 9:10PM CDT until April 13 at 1:00PM CDT by NWS Chicago IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois... Des Plaines River near Gurnee affecting Lake IL County. Des Plaines River near Russell affecting Lake IL County. For the Des Plaines River...including Russell, Gurnee...Minor flooding is forecast. * 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 early Monday afternoon. * IMPACTS...At 9.0 feet, Kilbourne Road and Emerald Avenue threatened near Grand Avenue in Gurnee. * ADDITIONAL DETAILS... - At 8:30 PM CDT Thursday the stage was 8.0 feet. - Forecast...The river may remain near 8 feet through Friday night before slowly falling over the weekend. - Flood stage is 7.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 9, 2026, 9:10 pm      Expires:  April 10, 2026, 3:15 pm
Area:  Lake, IL


Flood Warning issued April 9 at 9:10PM CDT until April 13 at 7:00PM CDT by NWS Chicago IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois... Des Plaines River near Gurnee affecting Lake IL County. Des Plaines River near Russell affecting Lake IL County. For the Des Plaines River...including Russell, Gurnee...Minor flooding is forecast. * 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 Monday evening. * IMPACTS...At 8.0 feet, Agricultural and park land is inundated near the river. Residential property is threatened near the river. * ADDITIONAL DETAILS... - At 8:30 PM CDT Thursday the stage was 7.7 feet. - Forecast...The river is expected to continue gradually falling over the next day or two, and fall below flood stage sometime over the weekend. - Flood stage is 7.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 9, 2026, 9:10 pm      Expires:  April 10, 2026, 3:15 pm
Area:  Lake, IL