Weather Warnings for Illinois

Issued by the National Weather Service

Current watches, warnings, and advisories for Illinois
Alerts Updated: April 14, 2026, 10:30 am  UTC


Flood Warning issued April 13 at 9:43PM CDT until April 18 at 7:00PM CDT by NWS St Louis MO

Summary: ...The Flood Warning is extended for the following rivers in Missouri...Illinois... Mississippi River at Hannibal. Mississippi River at Clarksville. Mississippi River at Louisiana. Mississippi River at Winfield. 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 Hannibal. * WHEN...Until Saturday evening. * IMPACTS...At 17.0 feet, John Hay Recreation Area on east side (inside the Illinois Sny Levee) begins flooding. * ADDITIONAL DETAILS... - At 9:15 PM CDT Monday the stage was 17.3 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:15 PM CDT Monday was 17.3 feet. - Forecast...The river is expected to rise to a crest of 17.5 feet Wednesday morning. It will then fall below flood stage early Friday afternoon. - Flood stage is 17.0 feet.
Severity:  Severe    Effective:  April 13, 2026, 9:43 pm      Expires:  April 15, 2026, 9:45 am
Area:  Pike, IL; Marion, MO


Flood Warning issued April 13 at 9:43PM CDT until April 19 at 1:00AM CDT by NWS St Louis MO

Summary: ...The Flood Warning is extended for the following rivers in Missouri...Illinois... Mississippi River at Hannibal. Mississippi River at Clarksville. Mississippi River at Louisiana. Mississippi River at Winfield. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is forecast. * WHERE...Mississippi River at Winfield. * WHEN...From late Tuesday night to late Saturday night. * IMPACTS...At 27.5 feet, At this stage, Lock and Dam 25 will stockpile 200 tons of sand, 12,000 sandbags, and 10,000 square feet of polyethylene plastic as a precaution. * ADDITIONAL DETAILS... - At 9:30 PM CDT Monday the stage was 25.4 feet. - Forecast...The river is expected to rise above flood stage early Wednesday morning to a crest of 26.1 feet Wednesday morning. It will then fall below flood stage Friday evening. - Flood stage is 26.0 feet.
Severity:  Severe    Effective:  April 13, 2026, 9:43 pm      Expires:  April 15, 2026, 9:45 am
Area:  Calhoun, IL; Lincoln, MO


Flood Warning issued April 13 at 9:43PM CDT until April 20 at 7:00AM CDT by NWS St Louis MO

Summary: ...The Flood Warning is extended for the following rivers in Missouri...Illinois... Mississippi River at Hannibal. Mississippi River at Clarksville. Mississippi River at Louisiana. Mississippi River at Winfield. 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 Monday morning. * IMPACTS...At 17.0 feet, The parking area at the boat house floods. * ADDITIONAL DETAILS... - At 9:30 PM CDT Monday the stage was 15.8 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:30 PM CDT Monday was 15.8 feet. - Forecast...The river is expected to rise to a crest of 16.1 feet early tomorrow afternoon. It will then fall below flood stage early Sunday morning. - Flood stage is 15.0 feet.
Severity:  Severe    Effective:  April 13, 2026, 9:43 pm      Expires:  April 15, 2026, 9:45 am
Area:  Pike, IL; Pike, MO


Flood Warning issued April 13 at 9:43PM CDT until April 20 at 1:00PM CDT by NWS St Louis MO

Summary: ...The Flood Warning is extended for the following rivers in Missouri...Illinois... Mississippi River at Hannibal. Mississippi River at Clarksville. Mississippi River at Louisiana. Mississippi River at Winfield. 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 Monday afternoon. * IMPACTS...At 25.5 feet, State Route P east of Elsberry begins flooding just east of the levee. * ADDITIONAL DETAILS... - At 9:30 PM CDT Monday the stage was 25.8 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:30 PM CDT Monday was 25.8 feet. - Forecast...The river is expected to rise to a crest of 26.3 feet Wednesday evening. It will then fall below flood stage Sunday morning. - Flood stage is 25.0 feet.
Severity:  Severe    Effective:  April 13, 2026, 9:43 pm      Expires:  April 15, 2026, 9:45 am
Area:  Calhoun, IL; Pike, MO


Flood Warning issued April 13 at 9:00PM CDT until April 18 at 7:00PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois...Iowa... Mississippi River at Burlington affecting Des Moines, Lee, Henderson and Hancock Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. Wapsipinicon River near De Witt 4S affecting Clinton and Scott Counties. ...The Flood Warning is cancelled for the following rivers in Iowa... Iowa River at Oakville affecting Louisa County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Mississippi River at Burlington. * WHEN...Until Saturday evening. * IMPACTS...At 15.0 feet, Agricultural flooding occurs. * ADDITIONAL DETAILS... - At 8:00 PM CDT Monday the stage was 15.3 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:00 PM CDT Monday was 15.3 feet. - Forecast...The river is expected to rise to a crest of 15.3 feet just after midnight tonight. It will then fall below flood stage early Saturday morning. - Flood stage is 15.0 feet.
Severity:  Severe    Effective:  April 13, 2026, 9:00 pm      Expires:  April 14, 2026, 9:00 pm
Area:  Des Moines, IA; Lee, IA; Hancock, IL; Henderson, IL


Flood Warning issued April 13 at 9:00PM CDT until April 18 at 7:00PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois...Iowa... Mississippi River at Burlington affecting Des Moines, Lee, Henderson and Hancock Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. Wapsipinicon River near De Witt 4S affecting Clinton and Scott Counties. ...The Flood Warning is cancelled for the following rivers in Iowa... Iowa River at Oakville affecting Louisa County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Mississippi River at Gladstone LD18. * WHEN...Until Saturday evening. * ADDITIONAL DETAILS... - At 8:30 PM CDT Monday the stage was 10.3 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:30 PM CDT Monday was 10.3 feet. - Forecast...The river is expected to rise to a crest of 10.4 feet early Wednesday morning. It will then fall below flood stage early Saturday morning. - Flood stage is 10.0 feet.
Severity:  Severe    Effective:  April 13, 2026, 9:00 pm      Expires:  April 14, 2026, 9:00 pm
Area:  Des Moines, IA; Henderson, IL


Flood Warning issued April 13 at 8:50PM CDT until April 14 at 7:00PM 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, Lake IL and McHenry Counties. For the Fox River (Illinois)...including Algonquin Lock & Dam tailwater...Minor flooding is occurring. * 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 tomorrow evening. * IMPACTS...At 9.5 feet, Fox River Drive threatened in East Dundee. Boathouses threatened along the river in Cary. * ADDITIONAL DETAILS... - At 8:30 PM CDT Monday the stage was 9.5 feet. - Forecast...The river is expected to remain near flood stage Monday night before settling below flood stage on Tuesday. - Flood stage is 9.5 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 13, 2026, 8:50 pm      Expires:  April 14, 2026, 3:00 pm
Area:  Kane, IL; Lake, IL; McHenry, IL


Flood Warning issued April 13 at 8:37PM CDT by NWS Lincoln IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois... Illinois River near Havana affecting Cass, Fulton and Mason Counties. Illinois River at Beardstown affecting Cass, Brown, Schuyler and Morgan 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 7:45 PM CDT Monday the stage was 15.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 7:45 PM CDT Monday was 15.7 feet. - Forecast...The river is expected to fall to 14.4 feet Monday, April 20. - Flood stage is 14.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 13, 2026, 8:37 pm      Expires:  April 14, 2026, 12:45 pm
Area:  Cass, IL; Fulton, IL; Mason, IL


Flood Warning issued April 13 at 8:37PM CDT by NWS Lincoln IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois... Illinois River near Havana affecting Cass, Fulton and Mason Counties. Illinois River at Beardstown affecting Cass, Brown, Schuyler and Morgan 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 7:45 PM CDT Monday the stage was 15.1 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 7:45 PM CDT Monday was 15.2 feet. - Forecast...The river is expected to fall to 14.0 feet Monday, April 20. - Flood stage is 14.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 13, 2026, 8:37 pm      Expires:  April 14, 2026, 12:45 pm
Area:  Brown, IL; Cass, IL; Morgan, IL; Schuyler, IL