Weather Warnings for Illinois

Issued by the National Weather Service

Current watches, warnings, and advisories for Illinois
Alerts Updated: April 22, 2026, 2:47 am  UTC


Flood Warning issued April 21 at 9:46PM CDT by NWS Milwaukee/Sullivan WI

Summary: ...The Flood Warning continues for the following rivers in Illinois...Wisconsin... Rock River At Afton affecting Winnebago and Rock Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Afton. * WHEN...Until further notice. * IMPACTS...At 11.1 feet, Floodwaters affect Riverside Park and a road in Riverside park on the north side of Janesville and South River Road on the south side of Janesville. Floodwaters affect low spots on South River Rd on the south side of Janesville. Floodwaters affect a home on South Christian Rd on the east side of the river in the Afton area. There is extensive lowland and agricultural land flooding in the Afton and Janesville areas. * ADDITIONAL DETAILS... - At 9:00 PM CDT Tuesday the stage was 10.6 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Tuesday was 10.6 feet. - Forecast...The river is expected to remain steady above flood stage at 10.6 feet. - Flood stage is 9.0 feet. - Flood History...This crest compares to a previous crest of 11.0 feet on 06/01/2004. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 21, 2026, 9:46 pm      Expires:  April 22, 2026, 10:00 am
Area:  Winnebago, IL; Rock, WI


Flood Warning issued April 21 at 9:42PM CDT until April 28 at 7:00PM CDT by NWS Milwaukee/Sullivan WI

Summary: ...The Flood Warning continues for the following rivers in Illinois...Wisconsin... Fox River Lower Near New Munster affecting Kenosha and Lake Counties. * WHAT...Major flooding is occurring and major flooding is forecast. * WHERE...Fox River Lower near New Munster. * WHEN...Until Tuesday, April 28. * IMPACTS...At 14.0 feet, There is flooding of the lower levels of homes in the Town of Wheatland and Village of Salem Lakes areas long Riverside Drive, Shorewood Drive, 101st Street and Shorewood Terrace. * ADDITIONAL DETAILS... - At 9:00 PM CDT Tuesday the stage was 14.4 feet. - Bankfull stage is 10.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Tuesday was 14.7 feet. - Forecast...The river is expected to fall below flood stage Tuesday, April 28 and continue falling to 10.9 feet Tuesday, April 28. - Flood stage is 11.0 feet. - Flood History...This crest compares to a previous crest of 14.5 feet on 04/20/2013. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 21, 2026, 9:42 pm      Expires:  April 22, 2026, 9:45 am
Area:  Lake, IL; Kenosha, WI


Flood Warning issued April 21 at 9:26PM CDT by NWS St Louis MO

Summary: ...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Chester. Mississippi River at Canton. Mississippi River at Grafton. Mississippi River at Saverton. Mississippi River at Winfield. Mississippi River at Hannibal. 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 Hannibal. * WHEN...Until further notice. * ADDITIONAL DETAILS... - At 8:15 PM CDT Tuesday the stage was 19.3 feet. - Forecast...The river is expected to fall to 17.9 feet Tuesday, April 28. - Flood stage is 17.0 feet.
Severity:  Severe    Effective:  April 21, 2026, 9:26 pm      Expires:  April 23, 2026, 9:30 am
Area:  Pike, IL; Marion, MO


Flood Warning issued April 21 at 9:26PM CDT by NWS St Louis MO

Summary: ...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Chester. Mississippi River at Canton. Mississippi River at Grafton. Mississippi River at Saverton. Mississippi River at Winfield. Mississippi River at Hannibal. 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. * ADDITIONAL DETAILS... - At 9:00 PM CDT Tuesday the stage was 18.2 feet. - Forecast...The river is expected to fall to 16.6 feet Tuesday, April 28. - Flood stage is 15.0 feet.
Severity:  Severe    Effective:  April 21, 2026, 9:26 pm      Expires:  April 23, 2026, 9:30 am
Area:  Pike, IL; Pike, MO


Flood Warning issued April 21 at 9:26PM CDT by NWS St Louis MO

Summary: ...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Chester. Mississippi River at Canton. Mississippi River at Grafton. Mississippi River at Saverton. Mississippi River at Winfield. Mississippi River at Hannibal. 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 Saverton. * WHEN...Until further notice. * ADDITIONAL DETAILS... - At 8:00 PM CDT Tuesday the stage was 18.0 feet. - Forecast...The river is expected to fall to 16.4 feet Tuesday, April 28. - Flood stage is 16.0 feet.
Severity:  Severe    Effective:  April 21, 2026, 9:26 pm      Expires:  April 23, 2026, 9:30 am
Area:  Pike, IL; Ralls, MO


Flood Warning issued April 21 at 9:26PM CDT by NWS St Louis MO

Summary: ...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Chester. Mississippi River at Canton. Mississippi River at Grafton. Mississippi River at Saverton. Mississippi River at Winfield. Mississippi River at Hannibal. 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. * ADDITIONAL DETAILS... - At 9:00 PM CDT Tuesday the stage was 28.3 feet. - Forecast...The river is expected to slowly fall to 27.4 feet by Monday. - Flood stage is 25.0 feet.
Severity:  Severe    Effective:  April 21, 2026, 9:26 pm      Expires:  April 23, 2026, 9:30 am
Area:  Calhoun, IL; Pike, MO


Flood Warning issued April 21 at 9:26PM CDT by NWS St Louis MO

Summary: ...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Chester. Mississippi River at Canton. Mississippi River at Grafton. Mississippi River at Saverton. Mississippi River at Winfield. Mississippi River at Hannibal. 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 Winfield. * WHEN...Until further notice. * ADDITIONAL DETAILS... - At 9:00 PM CDT Tuesday the stage was 28.4 feet. - Forecast...The river is expected to rise to a crest of 28.4 feet just after midnight tonight. - Flood stage is 26.0 feet.
Severity:  Severe    Effective:  April 21, 2026, 9:26 pm      Expires:  April 23, 2026, 9:30 am
Area:  Calhoun, IL; Lincoln, MO


Flood Warning issued April 21 at 9:26PM CDT until April 29 at 7:00AM CDT by NWS St Louis MO

Summary: ...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Chester. Mississippi River at Canton. Mississippi River at Grafton. Mississippi River at Saverton. Mississippi River at Winfield. Mississippi River at Hannibal. 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 Canton. * WHEN...Until Wednesday, April 29. * ADDITIONAL DETAILS... - At 6:00 PM CDT Tuesday the stage was 15.7 feet. - Forecast...The river is expected to fall below flood stage Tuesday, April 28. - Flood stage is 15.0 feet.
Severity:  Severe    Effective:  April 21, 2026, 9:26 pm      Expires:  April 23, 2026, 9:30 am
Area:  Adams, IL; Lewis, MO


Flood Warning issued April 21 at 9:26PM CDT until April 24 at 7:00PM CDT by NWS St Louis MO

Summary: ...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Chester. Mississippi River at Canton. Mississippi River at Grafton. Mississippi River at Saverton. Mississippi River at Winfield. Mississippi River at Hannibal. 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 Chester. * WHEN...Until Friday evening. * ADDITIONAL DETAILS... - At 9:00 PM CDT Tuesday the stage was 27.8 feet. - Forecast...The river is near crest now. It will then fall below flood stage early Thursday afternoon. - Flood stage is 27.0 feet.
Severity:  Severe    Effective:  April 21, 2026, 9:26 pm      Expires:  April 23, 2026, 9:30 am
Area:  Jackson, IL; Randolph, IL; Perry, MO; Ste. Genevieve, MO


Flood Warning issued April 21 at 9:26PM CDT by NWS St Louis MO

Summary: ...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Chester. Mississippi River at Canton. Mississippi River at Grafton. Mississippi River at Saverton. Mississippi River at Winfield. Mississippi River at Hannibal. 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 Grafton. * WHEN...Until further notice. * ADDITIONAL DETAILS... - At 9:00 PM CDT Tuesday the stage was 20.7 feet. - Forecast...The river is expected to rise to a crest of 20.8 feet just after midnight tonight. - Flood stage is 20.0 feet.
Severity:  Severe    Effective:  April 21, 2026, 9:26 pm      Expires:  April 23, 2026, 9:30 am
Area:  Jersey, IL; St. Charles, MO


Flood Warning issued April 21 at 9:16PM CDT by NWS St Louis MO

Summary: ...The Flood Warning continues for the following rivers in Illinois... Illinois River at Hardin. 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...Illinois River at Hardin. * WHEN...Until further notice. * ADDITIONAL DETAILS... - At 9:00 PM CDT Tuesday the stage was 26.3 feet. - Forecast...The river is expected to remain near 26.3 feet through Friday and then begin a slow fall. - Flood stage is 25.0 feet.
Severity:  Severe    Effective:  April 21, 2026, 9:16 pm      Expires:  April 23, 2026, 9:30 am
Area:  Calhoun, IL; Greene, IL; Jersey, IL


Flood Warning issued April 21 at 8:56PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning continues for the following rivers in Illinois...Iowa...Missouri... Mississippi River at Ill. City LD16 affecting Rock Island and Muscatine Counties. Mississippi River at Rock Island LD15 affecting Scott, Rock Island and Muscatine Counties. Mississippi River at Muscatine affecting Mercer, Rock Island, Louisa and Muscatine Counties. Mississippi River at Gregory Landing affecting Clark and Hancock Counties. Mississippi River at New Boston LD17 affecting Mercer and Louisa Counties. Mississippi River at Keithsburg affecting Mercer, Des Moines, Louisa and Henderson Counties. Mississippi River at Burlington affecting Des Moines, Henderson, Lee and Hancock Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. * WHAT...Moderate flooding is occurring and moderate flooding is forecast. * WHERE...Mississippi River at Keithsburg. * WHEN...Until further notice. * IMPACTS...At 16.0 feet, Water is over the campground and boat ramp in Keithsburg. * ADDITIONAL DETAILS... - At 8:30 PM CDT Tuesday the stage was 15.8 feet. - Forecast...The river is expected to rise to a crest of 16.0 feet early Thursday afternoon. - Flood stage is 14.0 feet.
Severity:  Severe    Effective:  April 21, 2026, 8:56 pm      Expires:  April 22, 2026, 9:00 pm
Area:  Des Moines, IA; Louisa, IA; Henderson, IL; Mercer, IL


Flood Warning issued April 21 at 8:56PM CDT until April 27 at 4:00PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning continues for the following rivers in Illinois...Iowa...Missouri... Mississippi River at Ill. City LD16 affecting Rock Island and Muscatine Counties. Mississippi River at Rock Island LD15 affecting Scott, Rock Island and Muscatine Counties. Mississippi River at Muscatine affecting Mercer, Rock Island, Louisa and Muscatine Counties. Mississippi River at Gregory Landing affecting Clark and Hancock Counties. Mississippi River at New Boston LD17 affecting Mercer and Louisa Counties. Mississippi River at Keithsburg affecting Mercer, Des Moines, Louisa and Henderson Counties. Mississippi River at Burlington affecting Des Moines, Henderson, Lee and Hancock Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. * WHAT...Minor flooding is occurring and moderate flooding is forecast. * WHERE...Mississippi River at Rock Island LD15. * WHEN...Until Monday afternoon. * IMPACTS...At 16.0 feet, Water affects sidewalks along the river at Le Claire Park. Water also affects Credit Island Lane and Moline's River Drive in the 4700 block. * ADDITIONAL DETAILS... - At 8:30 PM CDT Tuesday the stage was 15.5 feet. - Forecast...The river is expected to rise to a crest of 16.0 feet Thursday evening. It will then fall below flood stage late Sunday evening. - Flood stage is 15.0 feet.
Severity:  Severe    Effective:  April 21, 2026, 8:56 pm      Expires:  April 22, 2026, 9:00 pm
Area:  Muscatine, IA; Scott, IA; Rock Island, IL


Flood Warning issued April 21 at 8:56PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning continues for the following rivers in Illinois...Iowa...Missouri... Mississippi River at Ill. City LD16 affecting Rock Island and Muscatine Counties. Mississippi River at Rock Island LD15 affecting Scott, Rock Island and Muscatine Counties. Mississippi River at Muscatine affecting Mercer, Rock Island, Louisa and Muscatine Counties. Mississippi River at Gregory Landing affecting Clark and Hancock Counties. Mississippi River at New Boston LD17 affecting Mercer and Louisa Counties. Mississippi River at Keithsburg affecting Mercer, Des Moines, Louisa and Henderson Counties. Mississippi River at Burlington affecting Des Moines, Henderson, Lee and Hancock Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. * WHAT...Moderate flooding is occurring and moderate flooding is forecast. * WHERE...Mississippi River at New Boston LD17. * WHEN...Until further notice. * IMPACTS...At 18.1 feet, Lock and Dam 17 is closed. * ADDITIONAL DETAILS... - At 8:40 PM CDT Tuesday the stage was 16.8 feet. - Forecast...The river is expected to rise to a crest of 17.3 feet early Friday afternoon. - Flood stage is 15.0 feet.
Severity:  Severe    Effective:  April 21, 2026, 8:56 pm      Expires:  April 22, 2026, 9:00 pm
Area:  Louisa, IA; Mercer, IL


Flood Warning issued April 21 at 8:56PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning continues for the following rivers in Illinois...Iowa...Missouri... Mississippi River at Ill. City LD16 affecting Rock Island and Muscatine Counties. Mississippi River at Rock Island LD15 affecting Scott, Rock Island and Muscatine Counties. Mississippi River at Muscatine affecting Mercer, Rock Island, Louisa and Muscatine Counties. Mississippi River at Gregory Landing affecting Clark and Hancock Counties. Mississippi River at New Boston LD17 affecting Mercer and Louisa Counties. Mississippi River at Keithsburg affecting Mercer, Des Moines, Louisa and Henderson Counties. Mississippi River at Burlington affecting Des Moines, Henderson, Lee and Hancock Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Mississippi River at Gregory Landing. * WHEN...Until further notice. * IMPACTS...At 16.0 feet, Water affects buildings in unprotected low areas. * ADDITIONAL DETAILS... - At 8:30 PM CDT Tuesday the stage was 16.0 feet. - The river remains in a broad, long crest. - Forecast...The river will remain around 16.0 feet through Saturday, before beginning to slowly fall. - Flood stage is 15.0 feet.
Severity:  Severe    Effective:  April 21, 2026, 8:56 pm      Expires:  April 22, 2026, 9:00 pm
Area:  Hancock, IL; Clark, MO


Flood Warning issued April 21 at 8:56PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning continues for the following rivers in Illinois...Iowa...Missouri... Mississippi River at Ill. City LD16 affecting Rock Island and Muscatine Counties. Mississippi River at Rock Island LD15 affecting Scott, Rock Island and Muscatine Counties. Mississippi River at Muscatine affecting Mercer, Rock Island, Louisa and Muscatine Counties. Mississippi River at Gregory Landing affecting Clark and Hancock Counties. Mississippi River at New Boston LD17 affecting Mercer and Louisa Counties. Mississippi River at Keithsburg affecting Mercer, Des Moines, Louisa and Henderson Counties. Mississippi River at Burlington affecting Des Moines, Henderson, Lee and Hancock Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. * WHAT...Moderate flooding is occurring and moderate flooding is forecast. * WHERE...Mississippi River at Gladstone LD18. * WHEN...Until further notice. * ADDITIONAL DETAILS... - At 8:30 PM CDT Tuesday the stage was 12.7 feet. - Forecast...The river is expected to rise to a crest of 12.9 feet early Thursday morning. - Flood stage is 10.0 feet.
Severity:  Severe    Effective:  April 21, 2026, 8:56 pm      Expires:  April 22, 2026, 9:00 pm
Area:  Des Moines, IA; Henderson, IL


Flood Warning issued April 21 at 8:56PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning continues for the following rivers in Illinois...Iowa...Missouri... Mississippi River at Ill. City LD16 affecting Rock Island and Muscatine Counties. Mississippi River at Rock Island LD15 affecting Scott, Rock Island and Muscatine Counties. Mississippi River at Muscatine affecting Mercer, Rock Island, Louisa and Muscatine Counties. Mississippi River at Gregory Landing affecting Clark and Hancock Counties. Mississippi River at New Boston LD17 affecting Mercer and Louisa Counties. Mississippi River at Keithsburg affecting Mercer, Des Moines, Louisa and Henderson Counties. Mississippi River at Burlington affecting Des Moines, Henderson, Lee and Hancock Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. * WHAT...Moderate flooding is occurring and moderate flooding is forecast. * WHERE...Mississippi River at Burlington. * WHEN...Until further notice. * IMPACTS...At 17.5 feet, Water affects Riverview Drive in Riverview Park in Fort Madison. * ADDITIONAL DETAILS... - At 8:00 PM CDT Tuesday the stage was 17.3 feet. - Forecast...The river is expected to rise to a crest of 17.5 feet Thursday evening. - Flood stage is 15.0 feet.
Severity:  Severe    Effective:  April 21, 2026, 8:56 pm      Expires:  April 22, 2026, 9:00 pm
Area:  Des Moines, IA; Lee, IA; Hancock, IL; Henderson, IL


Flood Warning issued April 21 at 8:56PM CDT by NWS Lincoln IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Illinois River near Havana affecting Fulton, Cass and Mason Counties. Illinois River at Beardstown affecting Brown, Morgan, Schuyler and Cass Counties. ...The Flood Warning is cancelled for the following rivers in Illinois... Illinois River at Peoria affecting Peoria, Tazewell and Woodford 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 18.0 feet, Seepage problems begin in the Lost Creek Drainage and Levee District. * ADDITIONAL DETAILS... - At 8:45 PM CDT Tuesday the stage was 16.6 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:45 PM CDT Tuesday was 16.6 feet. - Forecast...The river is expected to rise to a crest of 16.6 feet early tomorrow afternoon. - Flood stage is 14.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 21, 2026, 8:56 pm      Expires:  April 22, 2026, 1:00 pm
Area:  Brown, IL; Cass, IL; Morgan, IL; Schuyler, IL


Flood Warning issued April 21 at 8:56PM CDT by NWS Lincoln IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Illinois River near Havana affecting Fulton, Cass and Mason Counties. Illinois River at Beardstown affecting Brown, Morgan, Schuyler and Cass Counties. ...The Flood Warning is cancelled for the following rivers in Illinois... Illinois River at Peoria affecting Peoria, Tazewell and Woodford 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. * ADDITIONAL DETAILS... - At 8:45 PM CDT Tuesday the stage was 16.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:45 PM CDT Tuesday was 16.5 feet. - Forecast...The river is expected to rise to a crest of 16.7 feet early Thursday afternoon. - Flood stage is 14.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 21, 2026, 8:56 pm      Expires:  April 22, 2026, 1:00 pm
Area:  Cass, IL; Fulton, IL; Mason, IL


Flood Warning issued April 21 at 8:56PM CDT until April 28 at 3:00PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning continues for the following rivers in Illinois...Iowa...Missouri... Mississippi River at Ill. City LD16 affecting Rock Island and Muscatine Counties. Mississippi River at Rock Island LD15 affecting Scott, Rock Island and Muscatine Counties. Mississippi River at Muscatine affecting Mercer, Rock Island, Louisa and Muscatine Counties. Mississippi River at Gregory Landing affecting Clark and Hancock Counties. Mississippi River at New Boston LD17 affecting Mercer and Louisa Counties. Mississippi River at Keithsburg affecting Mercer, Des Moines, Louisa and Henderson Counties. Mississippi River at Burlington affecting Des Moines, Henderson, Lee and Hancock Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Mississippi River at Muscatine. * WHEN...Until Tuesday, April 28. * IMPACTS...At 18.0 feet, Water affects most of the Riverside Park parking lot. * ADDITIONAL DETAILS... - At 8:15 PM CDT Tuesday the stage was 16.9 feet. - Forecast...The river is expected to rise to a crest of 17.6 feet Friday morning. It will then fall below flood stage late Monday evening. - Flood stage is 16.0 feet.
Severity:  Severe    Effective:  April 21, 2026, 8:56 pm      Expires:  April 22, 2026, 9:00 pm
Area:  Louisa, IA; Muscatine, IA; Mercer, IL; Rock Island, IL


Flood Warning issued April 21 at 8:56PM CDT until April 27 at 7:00PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning continues for the following rivers in Illinois...Iowa...Missouri... Mississippi River at Ill. City LD16 affecting Rock Island and Muscatine Counties. Mississippi River at Rock Island LD15 affecting Scott, Rock Island and Muscatine Counties. Mississippi River at Muscatine affecting Mercer, Rock Island, Louisa and Muscatine Counties. Mississippi River at Gregory Landing affecting Clark and Hancock Counties. Mississippi River at New Boston LD17 affecting Mercer and Louisa Counties. Mississippi River at Keithsburg affecting Mercer, Des Moines, Louisa and Henderson Counties. Mississippi River at Burlington affecting Des Moines, Henderson, Lee and Hancock Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Mississippi River at Ill. City LD16. * WHEN...Until Monday evening. * IMPACTS...At 16.0 feet, Water affects the park at Andalusia. * ADDITIONAL DETAILS... - At 8:30 PM CDT Tuesday the stage was 15.3 feet. - Forecast...The river is expected to rise to a crest of 15.7 feet Thursday evening. It will then fall below flood stage early Monday morning. - Flood stage is 15.0 feet.
Severity:  Severe    Effective:  April 21, 2026, 8:56 pm      Expires:  April 22, 2026, 9:00 pm
Area:  Muscatine, IA; Rock Island, IL


Flood Warning issued April 21 at 8:53PM CDT until April 24 at 7:00AM CDT by NWS Chicago IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Illinois River at La Salle affecting Bureau, Putnam and La Salle Counties. * WHAT...Minor flooding is occurring and forecasted to continue. * WHERE...Illinois River from Starved Rock Lock and Dam downstream to confluence with Big Bureau Creek, including the La Salle gauge. * WHEN...Until Friday morning. * IMPACTS...At 20.0 feet, Agricultural areas in La Salle, Spring Valley, and Peru are inundated. * ADDITIONAL DETAILS... - At 8:45 PM CDT Tuesday the stage was 20.8 feet. - Forecast...The river is expected to fall below flood stage late this week. - Flood stage is 20.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 21, 2026, 8:53 pm      Expires:  April 22, 2026, 3:00 pm
Area:  Bureau, IL; La Salle, IL; Putnam, IL


Flood Warning issued April 21 at 8:47PM CDT by NWS Chicago IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Des Plaines River at Lincolnshire affecting Cook and Lake IL Counties. Des Plaines River near Des Plaines affecting Cook County. Des Plaines River near Gurnee affecting Lake IL County. Des Plaines River near Russell affecting Lake IL County. * WHAT...Moderate flooding is occurring and forecasted to continue. * WHERE...Des Plaines River from IL/WI state line downstream to US-41 in Gurnee, including the Russell gauge. * WHEN...Until further notice. * IMPACTS...At 8.0 feet, Agricultural and park land is inundated near the river. Residential property is threatened near the river. * ADDITIONAL DETAILS... - At 7:30 PM CDT Tuesday the stage was 8.6 feet. - Forecast...The river is expected to continue gradually falling, and may drop below Flood stage this weekend. - Flood stage is 7.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 21, 2026, 8:47 pm      Expires:  April 22, 2026, 3:00 pm
Area:  Lake, IL


Flood Warning issued April 21 at 8:47PM CDT until April 24 at 1:00PM CDT by NWS Chicago IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Des Plaines River at Lincolnshire affecting Cook and Lake IL Counties. Des Plaines River near Des Plaines affecting Cook County. Des Plaines River near Gurnee affecting Lake IL County. Des Plaines River near Russell affecting Lake IL County. * WHAT...Moderate flooding is occurring and forecasted to continue. * WHERE...Des Plaines River from Townline Road in Libertyville downstream to Palatine Road in Prospect Heights, including the Lincolnshire gauge. * WHEN...Until early Friday afternoon. * IMPACTS...At 15.0 feet, Structures threatened along IL-22 (Half-Day Road) just east of the river. Multiple structures threatened near and west of US-45 (Milwaukee Avenue) and Deerfield Road. Deerfield Road threatened near the river. Multiple trails inundated in Half-Day Forest Preserve. * ADDITIONAL DETAILS... - At 7:45 PM CDT Tuesday the stage was 14.9 feet. - Forecast...The river is expected to continue gradually falling through the week, and may fall below Flood stage by Friday morning. - Flood stage is 12.5 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 21, 2026, 8:47 pm      Expires:  April 22, 2026, 3:00 pm
Area:  Cook, IL; Lake, IL


Flood Warning issued April 21 at 8:47PM CDT until April 25 at 1:00AM CDT by NWS Chicago IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Des Plaines River at Lincolnshire affecting Cook and Lake IL Counties. Des Plaines River near Des Plaines affecting Cook County. Des Plaines River near Gurnee affecting Lake IL County. Des Plaines River near Russell affecting Lake IL County. * WHAT...Minor flooding is occurring and forecasted to continue. * WHERE...Des Plaines River from Palatine Road in Prospect Heights downstream to Irving Park Road in Chicago, including the Des Plaines gauge. * WHEN...Until early Saturday morning. * IMPACTS...At 18.5 feet, Big Flood History...This crest compares to a previous crest of 17.8 feet on 03/12/2021.Bend Road threatened in Des Plaines. * ADDITIONAL DETAILS... - At 7:45 PM CDT Tuesday the stage was 17.8 feet. - Forecast...The river is expected to continue gradually falling, and may fall below Flood stage by Friday evening. - Flood stage is 15.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 21, 2026, 8:47 pm      Expires:  April 22, 2026, 3:00 pm
Area:  Cook, IL


Flood Warning issued April 21 at 8:47PM CDT until April 25 at 7:00AM CDT by NWS Chicago IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Des Plaines River at Lincolnshire affecting Cook and Lake IL Counties. Des Plaines River near Des Plaines affecting Cook County. Des Plaines River near Gurnee affecting Lake IL County. Des Plaines River near Russell affecting Lake IL County. * WHAT...Moderate flooding is occurring and forecasted to continue. * WHERE...Des Plaines River from US-41 in Gurnee downstream to Townline Road in Vernon Hills, including the Gurnee gauge. * WHEN...Until Saturday morning. * IMPACTS...At 10.0 feet, Residences threatened along Kilbourne Road and near O'Plaine Road and McClure Avenue in Gurnee. Businesses threatened along Old Grand Avenue near IL-132 in Gurnee. IL-132 (Grand Avenue) is threatened east of the river in Gurnee. * ADDITIONAL DETAILS... - At 8:30 PM CDT Tuesday the stage was 10.0 feet. - Forecast...The river is expected to continue gradually falling, and may fall below Flood stage by Saturday morning. - Flood stage is 7.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 21, 2026, 8:47 pm      Expires:  April 22, 2026, 3:00 pm
Area:  Lake, IL


Flood Warning issued April 21 at 8:39PM CDT by NWS Chicago IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Fox River at Montgomery affecting Kendall and Kane Counties. Fox River at Algonquin Lock & Dam tailwater affecting Kane, Lake IL and McHenry Counties. * WHAT...Minor flooding is occurring and forecasted to continue. * WHERE...Fox River from Red Gate Road in St. Charles downstream to Millington, including the Montgomery gauge. * WHEN...Until further notice. * IMPACTS...At 13.5 feet, Low-lying parking lots at city hall and Boy Scout Island are threatened in St. Charles. Fox River Trail is threatened at St. Mary Park in St. Charles. * ADDITIONAL DETAILS... - At 8:00 PM CDT Tuesday the stage was 13.6 feet. - Forecast...The river is expected to remain nearly steady until further notice. - Flood stage is 13.5 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 21, 2026, 8:39 pm      Expires:  April 22, 2026, 2:45 pm
Area:  Kane, IL; Kendall, IL


Flood Warning issued April 21 at 8:39PM CDT by NWS Chicago IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Fox River at Montgomery affecting Kendall and Kane Counties. Fox River at Algonquin Lock & Dam tailwater affecting Kane, Lake IL and McHenry Counties. * WHAT...Moderate flooding is occurring and major flooding is forecasted. * 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 12.0 feet, Structures threatened along River Street, Johnson Street, and Maiden Lane in East Dundee. North Harrison Street threatened near Riverside Park in Algonquin. Washington Street threatened in Carpentersville. Water Street, Edwards Avenue, and Elgin Avenue threatened in East Dundee. Bayview Road threatened in Elgin. Low-lying areas of Festival Park are threatened in Elgin. * ADDITIONAL DETAILS... - At 7:30 PM CDT Tuesday the stage was 11.9 feet. - Forecast...The river is expected to continue rising into Major flood stage and remain so until further notice. - Flood stage is 9.5 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 21, 2026, 8:39 pm      Expires:  April 22, 2026, 2:45 pm
Area:  Kane, IL; Lake, IL; McHenry, IL


Flood Warning issued April 21 at 8:29PM CDT until April 23 at 3:00AM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois... Pecatonica River at Freeport affecting Stephenson County. ...The Flood Warning continues for the following rivers in Iowa... Illinois... Wapsipinicon River near De Witt 4S affecting Scott and Clinton Counties. Rock River at Como affecting Whiteside County. Rock River at Moline affecting Rock Island and Henry IL Counties. Rock River near Joslin affecting Rock Island, Henry IL and Whiteside Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Pecatonica River at Freeport. * WHEN...Until early Thursday morning. * IMPACTS...At 13.0 feet, Flood Stage. Water affects low lying sections of Freeport mainly east of the Pecatonica River. * ADDITIONAL DETAILS... - At 7:30 PM CDT Tuesday the stage was 13.2 feet. - Forecast...The river is expected to fall below flood stage tomorrow evening and continue falling to 10.3 feet Tuesday, April 28. - Flood stage is 13.0 feet.
Severity:  Severe    Effective:  April 21, 2026, 8:29 pm      Expires:  April 22, 2026, 8:30 pm
Area:  Stephenson, IL


Flood Warning issued April 21 at 8:29PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois... Pecatonica River at Freeport affecting Stephenson County. ...The Flood Warning continues for the following rivers in Iowa... Illinois... Wapsipinicon River near De Witt 4S affecting Scott and Clinton Counties. Rock River at Como affecting Whiteside County. Rock River at Moline affecting Rock Island and Henry IL Counties. Rock River near Joslin affecting Rock Island, Henry IL and Whiteside Counties. * WHAT...Moderate flooding is occurring and moderate flooding is forecast. * WHERE...Rock River near Joslin. * WHEN...Until further notice. * IMPACTS...At 16.0 feet, Water affects much of Barstow Road between Barstow and Osborn. Water also affects homes in Osborn. * ADDITIONAL DETAILS... - At 7:45 PM CDT Tuesday the stage was 16.1 feet. - Forecast...The river is expected to rise to a crest of 16.2 feet just after midnight tonight, then begin slowly falling reaching 14.0 feet Saturday evening. - Flood stage is 12.0 feet.
Severity:  Severe    Effective:  April 21, 2026, 8:29 pm      Expires:  April 22, 2026, 8:30 pm
Area:  Henry, IL; Rock Island, IL; Whiteside, IL


Flood Warning issued April 21 at 8:29PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois... Pecatonica River at Freeport affecting Stephenson County. ...The Flood Warning continues for the following rivers in Iowa... Illinois... Wapsipinicon River near De Witt 4S affecting Scott and Clinton Counties. Rock River at Como affecting Whiteside County. Rock River at Moline affecting Rock Island and Henry IL Counties. Rock River near Joslin affecting Rock Island, Henry IL and Whiteside Counties. * WHAT...Major flooding is occurring and major flooding is forecast. * WHERE...Rock River at Moline. * WHEN...Until further notice. * IMPACTS...At 14.0 feet, Major Flood Stage. Water affects South Shore Drive and North Shore Drive in Moline west of the 27th Street bridge. Water limits access to homes on South Shore Drive east of the I-74 bridge. Water also affects portions of 60th Street south of John Deere Road. * ADDITIONAL DETAILS... - At 7:30 PM CDT Tuesday the stage was 14.1 feet. - The river is cresting now. - Forecast...The river is cresting around 14.1 feet this evening, and will begin to slowly fall overnight. It should fall below 14.0 feet early Wednesday morning. The river will continue to slowly fall to 13.0 feet by Saturday evening. - Flood stage is 12.0 feet.
Severity:  Severe    Effective:  April 21, 2026, 8:29 pm      Expires:  April 22, 2026, 8:30 pm
Area:  Henry, IL; Rock Island, IL


Flood Warning issued April 21 at 8:29PM CDT until April 22 at 9:00PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois... Pecatonica River at Freeport affecting Stephenson County. ...The Flood Warning continues for the following rivers in Iowa... Illinois... Wapsipinicon River near De Witt 4S affecting Scott and Clinton Counties. Rock River at Como affecting Whiteside County. Rock River at Moline affecting Rock Island and Henry IL Counties. Rock River near Joslin affecting Rock Island, Henry IL and Whiteside Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Como. * WHEN...Until late tomorrow evening. * IMPACTS...At 12.8 feet, Water begins to encroach into properties on Regan Road northeast of Como. * ADDITIONAL DETAILS... - At 8:00 PM CDT Tuesday the stage was 12.8 feet. - Forecast...The river is expected to fall below flood stage early tomorrow afternoon and continue falling to 10.5 feet Tuesday, April 28. - Flood stage is 12.5 feet.
Severity:  Severe    Effective:  April 21, 2026, 8:29 pm      Expires:  April 22, 2026, 8:30 pm
Area:  Whiteside, IL


Flood Warning issued April 21 at 8:22PM CDT by NWS Chicago IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Pecatonica River near Shirland affecting Winnebago County. * WHAT...Minor flooding is occurring and forecasted to continue. * WHERE...Pecatonica River from Winnebago County line downstream to confluence with the Rock River, including the Shirland gauge. * WHEN...Until further notice. * IMPACTS...At 14.0 feet, Structures threatened at Rivers Edge Campground east of Shirland. * ADDITIONAL DETAILS... - At 8:00 PM CDT Tuesday the stage was 13.9 feet. - Forecast...The river is expected to gradually fall over the next several days. - Flood stage is 12.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 21, 2026, 8:22 pm      Expires:  April 22, 2026, 2:30 pm
Area:  Winnebago, IL


Flood Warning issued April 21 at 8:20PM CDT by NWS Chicago IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Rock River at Byron affecting Ogle County. Rock River at Rockton affecting Winnebago County. Rock River at Latham Park affecting Winnebago County. * WHAT...Moderate flooding is occurring and forecasted to continue. * WHERE...Rock River from Swanson Road in Roscoe downstream to Shorewood Park in Loves Park, including the Latham Park gauge. * WHEN...Until further notice. * IMPACTS...At 11.5 feet, Queen Oaks Drive is threatened in Machesney Park. Lower-level of elevated structures threatened along Harbor Lights Court west of Machesney Park. Ritter Drive is threatened north of Baldwin Drive in Machesney Park. * ADDITIONAL DETAILS... - At 7:30 PM CDT Tuesday the stage was 11.3 feet. - Forecast...The river is expected to gradually fall, and will remain above Flood stage until further notice. - Flood stage is 9.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 21, 2026, 8:20 pm      Expires:  April 22, 2026, 2:30 pm
Area:  Winnebago, IL


Flood Warning issued April 21 at 8:20PM CDT by NWS Chicago IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Rock River at Byron affecting Ogle County. Rock River at Rockton affecting Winnebago County. Rock River at Latham Park affecting Winnebago County. * WHAT...Moderate flooding is occurring and forecasted to continue. * WHERE...Rock River from Prairie Hill Road downstream to Swanson Road in Roscoe, including the Rockton gauge. * WHEN...Until further notice. * IMPACTS...At 12.0 feet, Multiple low-lying roads threatened along the river in Roscoe. * ADDITIONAL DETAILS... - At 7:30 PM CDT Tuesday the stage was 12.1 feet. - Forecast...The river is expected to only gradually fall through the week. It may fall into Minor flood stage early next week. - Flood stage is 10.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 21, 2026, 8:20 pm      Expires:  April 22, 2026, 2:30 pm
Area:  Winnebago, IL


Flood Warning issued April 21 at 8:20PM CDT until April 24 at 7:00AM CDT by NWS Chicago IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Rock River at Byron affecting Ogle County. Rock River at Rockton affecting Winnebago County. Rock River at Latham Park affecting Winnebago County. * WHAT...Minor flooding is occurring and forecasted to continue. * WHERE...Rock River from Confluence with Kishwaukee River to Castle Rock State Park near Oregon, including the Byron gauge. * WHEN...Until Friday morning. * IMPACTS...At 13.5 feet, Numerous low-lying structures downstream of Byron are flooded. * ADDITIONAL DETAILS... - At 7:15 PM CDT Tuesday the stage was 13.7 feet. - Forecast...The river is expected to continue a gradual fall and may fall below flood stage Thursday evening. - Flood stage is 13.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 21, 2026, 8:20 pm      Expires:  April 22, 2026, 2:30 pm
Area:  Ogle, IL


Flood Warning issued April 21 at 6:04PM CDT until April 29 at 1:00PM CDT by NWS Chicago IL

Summary: * WHAT...Flooding caused by excessive rainfall continues. * WHERE...A portion of northeast Illinois, including the following counties, Lake IL and McHenry. * WHEN...Until further notice. * IMPACTS...Numerous roads, yards, structures, and areas of park land are flooding along the Fox River Chain of Lakes. Flooding will continue through at least the middle of next week. * ADDITIONAL DETAILS... - At 600 PM CDT, River gauges along the Fox River Chain of Lakes indicated water levels continuing to climb slowly. The rate of climb has slowed since yesterday. Water levels on Channel Lake exceeded major flood stage yesterday and water levels on Fox Lake and Nippersink Lake exceeded major flood stage today. The latest forecast from the Illinois Department of Natural Resources indicates that water levels are near crest. - Water levels are expected to remain above flood stage at least through the middle of next week, assuming no additional rainfall occurs. Impacts from this flood are likely to be similar to those experienced in May of 1973, April 1979, or October of 1986, which each crested at similar levels. - Some locations that will experience flooding include areas along the Fox River Chain of Lakes, including Nippersink Lake, Fox Lake, Pistakee Lake, Petite Lake, Lake Marie, Channel Lake, and Lake Catherine. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 21, 2026, 6:04 pm      Expires:  April 29, 2026, 1:00 pm
Area:  Lake, IL; McHenry, IL