Weather Warnings for Illinois

Issued by the National Weather Service

Current watches, warnings, and advisories for Illinois
Alerts Updated: April 19, 2026, 1:53 am  UTC


Flood Warning issued April 18 at 8:53PM CDT by NWS St Louis MO

Summary: ...The Flood Warning is extended for the following river 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...From this evening until further notice. * IMPACTS...At 25.0 feet, Flood Stage. Lowland flooding of unprotected agricultural land begins. * ADDITIONAL DETAILS... - At 8:30 PM CDT Saturday the stage was 25.1 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:30 PM CDT Saturday was 25.1 feet. - Forecast...The river is expected to rise to a crest of 26.8 feet early Wednesday afternoon. - Flood stage is 25.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:53 pm      Expires:  April 20, 2026, 9:00 am
Area:  Calhoun, IL; Greene, IL; Jersey, IL


Hydrologic Outlook issued April 18 at 8:48PM CDT by NWS Lincoln IL

Summary: ESFILX This hydrologic outlook includes the following river in Illinois: Illinois River... The following river information is based on future predicted rainfall. The exact amount, intensity, timing, and location of the rain that will occur is still uncertain. These outlook stages are provided to show what may be expected if the forecast precipitation occurs. Once there is more certainty about the river forecasts, a flood warning or statement will be issued if the threat materializes.
Severity:  Unknown    Effective:  April 18, 2026, 8:48 pm      Expires:  April 19, 2026, 10:00 am
Area:  Cass, IL; Fulton, IL; Marshall, IL; Mason, IL; Morgan, IL; Peoria, IL; Schuyler, IL; Tazewell, IL; Woodford, IL


Flood Warning issued April 18 at 8:47PM CDT by NWS St Louis MO

Summary: ...The Flood Warning continues for the following river in Missouri... Illinois... Mississippi River at Lock & Dam 21. Mississippi River at Canton. 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. * IMPACTS...At 29.0 feet, Route 96 at Mozier Landing closes. * ADDITIONAL DETAILS... - At 8:30 PM CDT Saturday the stage was 26.8 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:30 PM CDT Saturday was 26.8 feet. - Forecast...The river is expected to rise to a crest of 29.0 feet Monday evening. - Flood stage is 26.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:47 pm      Expires:  April 20, 2026, 9:00 am
Area:  Calhoun, IL; Lincoln, MO


Flood Warning issued April 18 at 8:47PM CDT until April 24 at 7:00AM CDT by NWS St Louis MO

Summary: ...The Flood Warning continues for the following river in Missouri... Illinois... Mississippi River at Lock & Dam 21. Mississippi River at Canton. 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 Lock & Dam 21. * WHEN...Until Friday morning. * ADDITIONAL DETAILS... - At 8:00 PM CDT Saturday the stage was 18.1 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:00 PM CDT Saturday was 18.1 feet. - Forecast...The river is expected to rise to a crest of 18.2 feet just after midnight tonight. It will then fall below flood stage early Thursday morning. - Flood stage is 18.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:47 pm      Expires:  April 20, 2026, 9:00 am
Area:  Adams, IL; Marion, MO


Flood Warning issued April 18 at 8:47PM CDT by NWS St Louis MO

Summary: ...The Flood Warning continues for the following river in Missouri... Illinois... Mississippi River at Lock & Dam 21. Mississippi River at Canton. 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 further notice. * IMPACTS...At 16.6 feet, Front Street leading to the campground and Corps park campgrounds flood at this height. * ADDITIONAL DETAILS... - At 4:00 PM CDT Saturday the stage was 15.8 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 4:00 PM CDT Saturday was 15.8 feet. - Forecast...The river is expected to rise to a crest of 16.0 feet Monday evening. - Flood stage is 15.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:47 pm      Expires:  April 20, 2026, 9:00 am
Area:  Adams, IL; Lewis, MO


Flood Warning issued April 18 at 8:47PM CDT by NWS St Louis MO

Summary: ...The Flood Warning continues for the following river in Missouri... Illinois... Mississippi River at Lock & Dam 21. Mississippi River at Canton. 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. * IMPACTS...At 19.6 feet, Maryland Street at 4th Street by the Town Branch bridge begins flooding near this height. * ADDITIONAL DETAILS... - At 8:30 PM CDT Saturday the stage was 17.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:30 PM CDT Saturday was 17.5 feet. - Forecast...The river is expected to rise to a crest of 18.5 feet tomorrow evening. - Flood stage is 15.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:47 pm      Expires:  April 20, 2026, 9:00 am
Area:  Pike, IL; Pike, MO


Flood Warning issued April 18 at 8:47PM CDT by NWS St Louis MO

Summary: ...The Flood Warning continues for the following river in Missouri... Illinois... Mississippi River at Lock & Dam 21. Mississippi River at Canton. 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. * IMPACTS...At 29.0 feet, Water enters the parking lot entrance at the Clarksville Riverfront Park. * ADDITIONAL DETAILS... - At 8:30 PM CDT Saturday the stage was 27.3 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:30 PM CDT Saturday was 27.3 feet. - Forecast...The river is expected to rise to a crest of 28.8 feet tomorrow evening. - Flood stage is 25.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:47 pm      Expires:  April 20, 2026, 9:00 am
Area:  Calhoun, IL; Pike, MO


Flood Warning issued April 18 at 8:47PM CDT by NWS St Louis MO

Summary: ...The Flood Warning continues for the following river in Missouri... Illinois... Mississippi River at Lock & Dam 21. Mississippi River at Canton. 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 Saturday the stage was 17.6 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:00 PM CDT Saturday was 17.6 feet. - Forecast...The river is expected to rise to a crest of 18.4 feet early tomorrow afternoon. - Flood stage is 16.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:47 pm      Expires:  April 20, 2026, 9:00 am
Area:  Pike, IL; Ralls, MO


Flood Warning issued April 18 at 8:47PM CDT by NWS St Louis MO

Summary: ...The Flood Warning continues for the following river in Missouri... Illinois... Mississippi River at Lock & Dam 21. Mississippi River at Canton. 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. * IMPACTS...At 20.2 feet, Nipper Park begins flooding on the Hannibal riverfront. * ADDITIONAL DETAILS... - At 8:15 PM CDT Saturday the stage was 19.3 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:15 PM CDT Saturday was 19.3 feet. - Forecast...The river is expected to rise to a crest of 19.6 feet tomorrow morning. - Flood stage is 17.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:47 pm      Expires:  April 20, 2026, 9:00 am
Area:  Pike, IL; Marion, MO


Flood Warning issued April 18 at 8:45PM CDT by NWS Lincoln IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Illinois River near Havana affecting Cass, Mason and Fulton 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 7:45 PM CDT Saturday the stage was 15.4 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 7:45 PM CDT Saturday was 15.4 feet. - Forecast...The river is expected to rise to a crest of 16.8 feet early Thursday morning. - Flood stage is 14.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 8:45 pm      Expires:  April 19, 2026, 12:45 pm
Area:  Cass, IL; Fulton, IL; Mason, IL


Flood Warning issued April 18 at 8:44PM CDT by NWS Lincoln IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Illinois River at Beardstown affecting Morgan, Cass, Schuyler and Brown 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 7:45 PM CDT Saturday the stage was 15.6 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 7:45 PM CDT Saturday was 15.6 feet. - Forecast...The river is expected to rise to 17.4 feet Thursday morning. Additional rises are possible thereafter. - Flood stage is 14.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 8:44 pm      Expires:  April 19, 2026, 12:45 pm
Area:  Brown, IL; Cass, IL; Morgan, IL; Schuyler, IL


Flood Warning issued April 18 at 8:43PM 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. * 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 further notice. * IMPACTS...At 22.0 feet, Lower parking lot at Starved Rock State Park is inundated east of La Salle. High water levels begin to impact shipping interests along the river. * ADDITIONAL DETAILS... - At 7:45 PM CDT Saturday the stage was 21.3 feet. - Forecast...The river is expected remain nearly steady into early next week. - Flood stage is 20.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 8:43 pm      Expires:  April 19, 2026, 2:45 pm
Area:  Bureau, IL; La Salle, IL; Putnam, IL


Flood Warning issued April 18 at 8:40PM CDT by NWS Chicago IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Fox River at Dayton affecting La Salle County. Fox River at Montgomery affecting Kane and Kendall Counties. Fox River at Algonquin Lock & Dam tailwater affecting Kane, McHenry and Lake IL Counties. * WHAT...Moderate flooding is occurring and forecasted to continue. * 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 Saturday the stage was 11.2 feet. - Forecast...The river is expected to continue gradually rising into next week. At this point, it is expected to remain just below Major Flood Stage. - Flood stage is 9.5 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 8:40 pm      Expires:  April 19, 2026, 2:45 pm
Area:  Kane, IL; Lake, IL; McHenry, IL


Flood Warning issued April 18 at 8:40PM CDT until April 20 at 7:00AM CDT by NWS Chicago IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Fox River at Dayton affecting La Salle County. Fox River at Montgomery affecting Kane and Kendall Counties. Fox River at Algonquin Lock & Dam tailwater affecting Kane, McHenry and Lake IL Counties. * WHAT...Minor flooding is forecasted. * WHERE...Fox River from Millington downstream to confluence with the Illinois River, including the Dayton gauge. * WHEN...Until Monday morning. * IMPACTS...At 12.5 feet, 2062nd Road threatened in Wedron. Low-lying agricultural land inundated near Wedron. * ADDITIONAL DETAILS... - At 7:45 PM CDT Saturday the stage was 11.9 feet. - Forecast...The river is expected to rise above flood stage late this evening and crest in Minor Flood Stage tomorrow. It is then expected to fall below Flood Stage Monday morning. - Flood stage is 12.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 8:40 pm      Expires:  April 19, 2026, 2:45 pm
Area:  La Salle, IL


Flood Warning issued April 18 at 8:40PM CDT by NWS Chicago IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Fox River at Dayton affecting La Salle County. Fox River at Montgomery affecting Kane and Kendall Counties. Fox River at Algonquin Lock & Dam tailwater affecting Kane, McHenry and Lake IL 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 Saturday the stage was 13.7 feet. - Forecast...The river is expected to remain steady through early next week. - Flood stage is 13.5 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 8:40 pm      Expires:  April 19, 2026, 2:45 pm
Area:  Kane, IL; Kendall, IL


Freeze Watch issued April 18 at 8:35PM CDT until April 20 at 9:00AM CDT by NWS Chicago IL

Summary: * WHAT...Sub-freezing temperatures as low as 30 possible. * WHERE...Northern Cook and Southern Cook Counties. * WHEN...From late Sunday night through Monday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Severity:  Severe    Effective:  April 18, 2026, 8:35 pm      Expires:  April 19, 2026, 6:45 am
Area:  Northern Cook; Southern Cook


Flood Warning issued April 18 at 8:35PM CDT by NWS Chicago IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois... Des Plaines River at Lincolnshire affecting Cook and Lake IL Counties. ...The Flood Warning continues for the following rivers in Illinois... Des Plaines River near Des Plaines affecting Cook County. Des Plaines River near Russell affecting Lake IL County. Des Plaines River near Gurnee affecting Lake IL County. * WHAT...Moderate flooding is occurring and Major flooding is forecasted. * WHERE...Des Plaines River from Townline Road in Libertyville downstream to Palatine Road in Prospect Heights, including the Lincolnshire gauge. * WHEN...Until further notice. * IMPACTS...At 16.0 feet, Numerous structures threatened along US-45 (Milwaukee Avenue) between IL-22 (Half Day Road) and Deerfield Road. Access route threatened for numerous residences near US-45 (Milwaukee Avenue) and Deerfield Road. IL-60 (Townline Road) threatened near the river. * ADDITIONAL DETAILS... - At 7:45 PM CDT Saturday the stage was 14.9 feet. - Forecast...The river is expected to rise to a crest near 15.7 feet (Major Flood Stage) tomorrow evening. It will then slowly fall through next week. - Flood stage is 12.5 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 8:35 pm      Expires:  April 19, 2026, 2:45 pm
Area:  Cook, IL; Lake, IL


Frost Advisory issued April 18 at 8:35PM CDT until April 19 at 9:00AM CDT by NWS Chicago IL

Summary: * WHAT...For the Frost Advisory, temperatures as low as 33 will result in frost formation. For the Freeze Watch, sub-freezing temperatures as low as 28 possible. * WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. * WHEN...For the Frost Advisory, from midnight CDT /1 AM EDT/ tonight to 9 AM CDT /10 AM EDT/ Sunday. For the Freeze Watch, from late Sunday night through Monday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
Severity:  Minor    Effective:  April 18, 2026, 8:35 pm      Expires:  April 19, 2026, 6:45 am
Area:  Winnebago; Boone; McHenry; Lake; Ogle; Lee; De Kalb; Kane; DuPage; La Salle; Kendall; Grundy; Kankakee; Livingston; Iroquois; Ford; Northern Will; Southern Will; Eastern Will; Lake; Porter; Newton; Jasper; Benton


Flood Warning issued April 18 at 8:35PM CDT by NWS Chicago IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois... Des Plaines River at Lincolnshire affecting Cook and Lake IL Counties. ...The Flood Warning continues for the following rivers in Illinois... Des Plaines River near Des Plaines affecting Cook County. Des Plaines River near Russell affecting Lake IL County. Des Plaines River near Gurnee affecting Lake IL County. * WHAT...Minor flooding is occurring and moderate flooding is forecasted. * WHERE...Des Plaines River from Palatine Road in Prospect Heights downstream to Irving Park Road in Chicago, including the Des Plaines gauge. * WHEN...Until further notice. * IMPACTS...At 18.5 feet, Big Bend Road threatened in Des Plaines. * ADDITIONAL DETAILS... - At 7:45 PM CDT Saturday the stage was 17.5 feet. - Forecast...The river is expected to rise to a crest near 18.0 feet tomorrow evening. It will then slowly fall through next week. - Flood stage is 15.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 8:35 pm      Expires:  April 19, 2026, 2:45 pm
Area:  Cook, IL


Flood Warning issued April 18 at 8:35PM CDT by NWS Chicago IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois... Des Plaines River at Lincolnshire affecting Cook and Lake IL Counties. ...The Flood Warning continues for the following rivers in Illinois... Des Plaines River near Des Plaines affecting Cook County. Des Plaines River near Russell affecting Lake IL County. Des Plaines River near Gurnee 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 further notice. * IMPACTS...At 11.0 feet, US-41 (Skokie Highway) threatened near the river in Gurnee. Mundelein Water Reclamation Facility property is threatened near Libertyville. * ADDITIONAL DETAILS... - At 7:30 PM CDT Saturday the stage was 10.6 feet. - Forecast...The river is expected to rise to a crest near 10.9 feet tomorrow morning, just below Major Flood Stage. It is then expected to fall through next week. - Flood stage is 7.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 8:35 pm      Expires:  April 19, 2026, 2:45 pm
Area:  Lake, IL


Flood Warning issued April 18 at 8:35PM CDT by NWS Chicago IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois... Des Plaines River at Lincolnshire affecting Cook and Lake IL Counties. ...The Flood Warning continues for the following rivers in Illinois... Des Plaines River near Des Plaines affecting Cook County. Des Plaines River near Russell affecting Lake IL County. Des Plaines River near Gurnee 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 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 7:30 PM CDT Saturday the stage was 9.6 feet. - Forecast...The river is expected to remain nearly steady through tomorrow before gradually falling next week. - Flood stage is 7.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 8:35 pm      Expires:  April 19, 2026, 2:45 pm
Area:  Lake, IL


Freeze Watch issued April 18 at 8:35PM CDT until April 20 at 9:00AM CDT by NWS Chicago IL

Summary: * WHAT...For the Frost Advisory, temperatures as low as 33 will result in frost formation. For the Freeze Watch, sub-freezing temperatures as low as 28 possible. * WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana. * WHEN...For the Frost Advisory, from midnight CDT /1 AM EDT/ tonight to 9 AM CDT /10 AM EDT/ Sunday. For the Freeze Watch, from late Sunday night through Monday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
Severity:  Severe    Effective:  April 18, 2026, 8:35 pm      Expires:  April 19, 2026, 6:45 am
Area:  Winnebago; Boone; McHenry; Lake; Ogle; Lee; De Kalb; Kane; DuPage; La Salle; Kendall; Grundy; Kankakee; Livingston; Iroquois; Ford; Northern Will; Southern Will; Eastern Will; Lake; Porter; Newton; Jasper; Benton


Flood Warning issued April 18 at 8:28PM CDT until April 20 at 7:00PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... La Moine River at Colmar affecting McDonough and Hancock Counties. * WHAT...Minor flooding is forecast. * WHERE...La Moine River at Colmar. * WHEN...Until Monday evening. * IMPACTS...At 20.0 feet, Water affects the lowest portions of Lambert Road and affects Lamar Road approximately 100 feet north of the intersection with County Road 26. * ADDITIONAL DETAILS... - At 7:45 PM CDT Saturday the stage was 19.5 feet and rising slowly. - Forecast...The river is expected to rise above flood stage late tomorrow morning to a crest of 20.9 feet tomorrow evening. It will then fall below flood stage late Monday morning. - Flood stage is 20.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:28 pm      Expires:  April 19, 2026, 8:30 pm
Area:  Hancock, IL; McDonough, IL


Flood Warning issued April 18 at 8:24PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois...Iowa... Mississippi River at Rock Island LD15 affecting Muscatine, Rock Island and Scott Counties. Mississippi River at Ill. City LD16 affecting Muscatine and Rock Island Counties. ...The Flood Warning continues for the following rivers in Illinois...Missouri...Iowa... 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, Louisa, Des Moines and Henderson Counties. Mississippi River at Burlington affecting Lee, Hancock, Des Moines and Henderson Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. Mississippi River at Muscatine affecting Mercer, Muscatine, Louisa and Rock Island Counties. * WHAT...Minor flooding is occurring and moderate flooding is forecast. * WHERE...Mississippi River at Keithsburg. * WHEN...Until further notice. * IMPACTS...At 16.5 feet, Water affects houses on 1st Street in Oquawka. * ADDITIONAL DETAILS... - At 7:30 PM CDT Saturday the stage was 14.8 feet and rising. - Forecast...The river is expected to rise to a crest of 16.3 feet early Friday morning. - Flood stage is 14.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:24 pm      Expires:  April 19, 2026, 8:30 pm
Area:  Des Moines, IA; Louisa, IA; Henderson, IL; Mercer, IL


Flood Warning issued April 18 at 8:24PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois...Iowa... Mississippi River at Rock Island LD15 affecting Muscatine, Rock Island and Scott Counties. Mississippi River at Ill. City LD16 affecting Muscatine and Rock Island Counties. ...The Flood Warning continues for the following rivers in Illinois...Missouri...Iowa... 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, Louisa, Des Moines and Henderson Counties. Mississippi River at Burlington affecting Lee, Hancock, Des Moines and Henderson Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. Mississippi River at Muscatine affecting Mercer, Muscatine, Louisa and Rock Island Counties. * WHAT...Moderate flooding is forecast. * WHERE...Mississippi River at Ill. City LD16. * WHEN...From late Sunday night until further notice. * IMPACTS...At 16.0 feet, Water affects the park at Andalusia. * ADDITIONAL DETAILS... - At 8:00 PM CDT Saturday the stage was 14.0 feet and rising. - Forecast...The river is expected to rise above flood stage early Monday morning and continue rising to 16.1 feet early Friday afternoon. Additional rises are possible thereafter. - Flood stage is 15.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:24 pm      Expires:  April 19, 2026, 8:30 pm
Area:  Muscatine, IA; Rock Island, IL


Flood Warning issued April 18 at 8:24PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois...Iowa... Mississippi River at Rock Island LD15 affecting Muscatine, Rock Island and Scott Counties. Mississippi River at Ill. City LD16 affecting Muscatine and Rock Island Counties. ...The Flood Warning continues for the following rivers in Illinois...Missouri...Iowa... 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, Louisa, Des Moines and Henderson Counties. Mississippi River at Burlington affecting Lee, Hancock, Des Moines and Henderson Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. Mississippi River at Muscatine affecting Mercer, Muscatine, Louisa and Rock Island Counties. * WHAT...Moderate flooding is forecast. * WHERE...Mississippi River at Muscatine. * WHEN...From Sunday morning until further notice. * IMPACTS...At 18.0 feet, Water affects most of the Riverside Park parking lot. * ADDITIONAL DETAILS... - At 7:15 PM CDT Saturday the stage was 15.6 feet and rising. - Forecast...The river is expected to rise above flood stage tomorrow morning and continue rising to 18.1 feet Friday evening. Additional rises are possible thereafter. - Flood stage is 16.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:24 pm      Expires:  April 19, 2026, 8:30 pm
Area:  Louisa, IA; Muscatine, IA; Mercer, IL; Rock Island, IL


Flood Warning issued April 18 at 8:24PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois...Iowa... Mississippi River at Rock Island LD15 affecting Muscatine, Rock Island and Scott Counties. Mississippi River at Ill. City LD16 affecting Muscatine and Rock Island Counties. ...The Flood Warning continues for the following rivers in Illinois...Missouri...Iowa... 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, Louisa, Des Moines and Henderson Counties. Mississippi River at Burlington affecting Lee, Hancock, Des Moines and Henderson Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. Mississippi River at Muscatine affecting Mercer, Muscatine, Louisa and Rock Island Counties. * WHAT...Minor 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 Saturday the stage was 16.4 feet and rising. - Forecast...The river is expected to rise to a crest of 17.5 feet early Friday morning. - Flood stage is 15.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:24 pm      Expires:  April 19, 2026, 8:30 pm
Area:  Des Moines, IA; Lee, IA; Hancock, IL; Henderson, IL


Flood Warning issued April 18 at 8:24PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois...Iowa... Mississippi River at Rock Island LD15 affecting Muscatine, Rock Island and Scott Counties. Mississippi River at Ill. City LD16 affecting Muscatine and Rock Island Counties. ...The Flood Warning continues for the following rivers in Illinois...Missouri...Iowa... 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, Louisa, Des Moines and Henderson Counties. Mississippi River at Burlington affecting Lee, Hancock, Des Moines and Henderson Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. Mississippi River at Muscatine affecting Mercer, Muscatine, Louisa and Rock Island Counties. * WHAT...Minor 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 7:40 PM CDT Saturday the stage was 15.5 feet and rising. - Forecast...The river is expected to rise to 17.6 feet early Friday afternoon. Additional rises are possible thereafter. - Flood stage is 15.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:24 pm      Expires:  April 19, 2026, 8:30 pm
Area:  Louisa, IA; Mercer, IL


Flood Watch issued April 18 at 8:24PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Watch is extended for the following rivers in Illinois...Iowa... Mississippi River at Camanche affecting Whiteside, Rock Island, Clinton and Scott zones. ...The Flood Watch is cancelled for the following rivers in Illinois...Iowa... Mississippi River at Dubuque affecting Jackson, Jo Daviess and Dubuque zones. * WHAT...Flooding is possible. * WHERE...Mississippi River at Camanche. * WHEN...From late Thursday night until further notice. * IMPACTS...At 17.0 feet, Water affects low-lying residences at Albany. * ADDITIONAL DETAILS... - At 7:30 PM CDT Saturday the stage was 15.5 feet and rising slowly. - Forecast...Flood stage may be reached early Friday morning. - Flood stage is 17.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:24 pm      Expires:  April 19, 2026, 8:30 pm
Area:  Clinton; Scott; Whiteside; Rock Island


Flood Warning issued April 18 at 8:24PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois...Iowa... Mississippi River at Rock Island LD15 affecting Muscatine, Rock Island and Scott Counties. Mississippi River at Ill. City LD16 affecting Muscatine and Rock Island Counties. ...The Flood Warning continues for the following rivers in Illinois...Missouri...Iowa... 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, Louisa, Des Moines and Henderson Counties. Mississippi River at Burlington affecting Lee, Hancock, Des Moines and Henderson Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. Mississippi River at Muscatine affecting Mercer, Muscatine, Louisa and Rock Island Counties. * WHAT...Moderate flooding is forecast. * WHERE...Mississippi River at Rock Island LD15. * WHEN...From Sunday morning until further notice. * IMPACTS...At 16.5 feet, Water affects Credit Island Lane in Davenport and the 4700 block of River Drive in Moline. Water is at the base of the flood wall gates at the downtown Rock Island riverfront. * ADDITIONAL DETAILS... - At 8:00 PM CDT Saturday the stage was 14.7 feet and rising. - Forecast...The river is expected to rise above flood stage tomorrow morning and continue rising to 16.3 feet Friday morning. Additional rises are possible thereafter. - Flood stage is 15.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:24 pm      Expires:  April 19, 2026, 8:30 pm
Area:  Muscatine, IA; Scott, IA; Rock Island, IL


Flood Warning issued April 18 at 8:24PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois...Iowa... Mississippi River at Rock Island LD15 affecting Muscatine, Rock Island and Scott Counties. Mississippi River at Ill. City LD16 affecting Muscatine and Rock Island Counties. ...The Flood Warning continues for the following rivers in Illinois...Missouri...Iowa... 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, Louisa, Des Moines and Henderson Counties. Mississippi River at Burlington affecting Lee, Hancock, Des Moines and Henderson Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. Mississippi River at Muscatine affecting Mercer, Muscatine, Louisa and Rock Island Counties. * WHAT...Minor flooding is occurring and moderate flooding is forecast. * WHERE...Mississippi River at Gladstone LD18. * WHEN...Until further notice. * ADDITIONAL DETAILS... - At 8:00 PM CDT Saturday the stage was 11.5 feet and rising. - Forecast...The river is expected to rise to a crest of 12.9 feet Friday morning. - Flood stage is 10.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:24 pm      Expires:  April 19, 2026, 8:30 pm
Area:  Des Moines, IA; Henderson, IL


Flood Warning issued April 18 at 8:24PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning is extended for the following rivers in Illinois...Iowa... Mississippi River at Rock Island LD15 affecting Muscatine, Rock Island and Scott Counties. Mississippi River at Ill. City LD16 affecting Muscatine and Rock Island Counties. ...The Flood Warning continues for the following rivers in Illinois...Missouri...Iowa... 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, Louisa, Des Moines and Henderson Counties. Mississippi River at Burlington affecting Lee, Hancock, Des Moines and Henderson Counties. Mississippi River at Gladstone LD18 affecting Des Moines and Henderson Counties. Mississippi River at Muscatine affecting Mercer, Muscatine, Louisa and Rock Island Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Mississippi River at Gregory Landing. * WHEN...Until further notice. * IMPACTS...At 17.0 feet, Water affects the road north of the grain elevator in Gregory Landing. * ADDITIONAL DETAILS... - At 8:00 PM CDT Saturday the stage was 16.1 feet and rising. - Forecast...The river is expected to rise to 16.7 feet Monday, April 20 and then hold. Additional rises are possible thereafter. - Flood stage is 15.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:24 pm      Expires:  April 19, 2026, 8:30 pm
Area:  Hancock, IL; Clark, MO


Flood Watch issued April 18 at 8:11PM CDT until April 22 at 7:00PM CDT by NWS Chicago IL

Summary: ...The Flood Watch continues for the following rivers in Illinois... Rock River at Dixon affecting Ogle and Lee Counties. Rock River at Rockford (Auburn Street) affecting Winnebago County. * WHAT...Flooding is possible. * WHERE...Rock River from Shorewood Park in Loves Park downstream to confluence with Kishwaukee River, including the Rockford (Auburn Street) gauge. * WHEN...From Monday morning to Wednesday evening. * IMPACTS...At 5.5 feet, Low-lying sections of the Rock River Recreation Trail are threatened in Rockford. Riverview Mobile Home Park is threatened in Rockford. * ADDITIONAL DETAILS... - At 7:45 PM CDT Saturday the stage was 5.5 feet. - Forecast...Flood stage may be reached tomorrow evening. - Flood stage is 6.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 8:11 pm      Expires:  April 19, 2026, 2:15 pm
Area:  Winnebago


Flood Watch issued April 18 at 8:11PM CDT until April 21 at 7:00AM CDT by NWS Chicago IL

Summary: ...The Flood Watch continues for the following rivers in Illinois... Rock River at Dixon affecting Ogle and Lee Counties. Rock River at Rockford (Auburn Street) affecting Winnebago County. * WHAT...Flooding is possible. * WHERE...Rock River from Castle Rock State Park near Oregon downstream to Lee County line, including the Dixon gauge. * WHEN...From Monday morning to Tuesday morning. * IMPACTS...At 16.0 feet, N Canal Drive threatened in Woodland Shores. Water overflows low-lying banks along west First Street in Dixon. Residential property threatened near Sherman Avenue and River Street in Dixon. * ADDITIONAL DETAILS... - At 7:15 PM CDT Saturday the stage was 15.0 feet. - Forecast...Flood stage may be reached Monday morning. - Flood stage is 16.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 8:11 pm      Expires:  April 19, 2026, 2:15 pm
Area:  Ogle; Lee


Flood Warning issued April 18 at 8:09PM 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 Confluence with Kishwaukee River to Castle Rock State Park near Oregon, including the Byron gauge. * WHEN...Until further notice. * IMPACTS...At 15.5 feet, Water threatens lower sections of the water treatment plant property in Byron. Water threatens IL-2 west of Byron. * ADDITIONAL DETAILS... - At 7:15 PM CDT Saturday the stage was 14.3 feet. - Forecast...The river is expected to rise toward a crest of 15.3 feet tomorrow evening. It is then expected to slowly fall through next week. - Flood stage is 13.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 8:09 pm      Expires:  April 19, 2026, 2:15 pm
Area:  Ogle, IL


Flood Warning issued April 18 at 8:09PM 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 12.5 feet, Residences threatened along Harbor Oaks Drive north of Machesney Park. Numerous residences are threatened near the river and Shore Drive. Low-lying sections of Rockford Country Club are inundated. * ADDITIONAL DETAILS... - At 7:30 PM CDT Saturday the stage was 11.7 feet. - Forecast...The river is expected to rise to a crest of 12.4 feet tomorrow evening and remain in Moderate Flood Stage until further notice. - Flood stage is 9.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 8:09 pm      Expires:  April 19, 2026, 2:15 pm
Area:  Winnebago, IL


Flood Warning issued April 18 at 8:09PM 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 13.5 feet, Old River Road threatened west of Roscoe Bridge. * ADDITIONAL DETAILS... - At 7:30 PM CDT Saturday the stage was 12.6 feet. - Forecast...The river is expected to rise to a crest of 13.1 feet tomorrow evening and remain in Moderate Flood Stage until further notice. - Flood stage is 10.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 8:09 pm      Expires:  April 19, 2026, 2:15 pm
Area:  Winnebago, IL


Flood Warning issued April 18 at 8:01PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Pecatonica River at Freeport affecting Stephenson County. Rock River at Como affecting Whiteside County. Rock River at Moline affecting Rock Island and Henry IL Counties. Rock River near Joslin affecting Whiteside, Rock Island and Henry IL Counties. * WHAT...Moderate flooding is occurring and major flooding is forecast. * WHERE...Rock River near Joslin. * WHEN...Until further notice. * IMPACTS...At 16.5 feet, Water affects the lowest sections of Broadway and Main Street in Cleveland and affects a few homes. * ADDITIONAL DETAILS... - At 6:45 PM CDT Saturday the stage was 14.1 feet and rising. - Forecast...The river is expected to rise to a crest of 16.8 feet Wednesday morning. - Flood stage is 12.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:01 pm      Expires:  April 19, 2026, 8:15 pm
Area:  Henry, IL; Rock Island, IL; Whiteside, IL


Flood Warning issued April 18 at 8:01PM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Pecatonica River at Freeport affecting Stephenson County. Rock River at Como affecting Whiteside County. Rock River at Moline affecting Rock Island and Henry IL Counties. Rock River near Joslin affecting Whiteside, Rock Island and Henry IL Counties. * WHAT...Minor 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 Saturday the stage was 12.8 feet and rising. - Forecast...The river is expected to rise to a crest of 14.5 feet Wednesday evening. - Flood stage is 12.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:01 pm      Expires:  April 19, 2026, 8:15 pm
Area:  Henry, IL; Rock Island, IL


Flood Warning issued April 18 at 8:01PM CDT until April 25 at 3:00AM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Pecatonica River at Freeport affecting Stephenson County. Rock River at Como affecting Whiteside County. Rock River at Moline affecting Rock Island and Henry IL Counties. Rock River near Joslin affecting Whiteside, Rock Island and Henry IL Counties. * WHAT...Minor flooding is forecast. * WHERE...Rock River at Como. * WHEN...Until Saturday, April 25. * IMPACTS...At 12.8 feet, Water begins to encroach into properties on Regan Road northeast of Como. * ADDITIONAL DETAILS... - At 7:45 PM CDT Saturday the stage was 12.2 feet and rising. - Forecast...The river is expected to rise above flood stage just after midnight tonight to a crest of 13.9 feet Monday evening. It will then fall below flood stage Friday evening. - Flood stage is 12.5 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:01 pm      Expires:  April 19, 2026, 8:15 pm
Area:  Whiteside, IL


Flood Warning issued April 18 at 8:01PM CDT until April 22 at 3:00AM CDT by NWS Quad Cities IA IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Pecatonica River at Freeport affecting Stephenson County. Rock River at Como affecting Whiteside County. Rock River at Moline affecting Rock Island and Henry IL Counties. Rock River near Joslin affecting Whiteside, Rock Island and Henry IL Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Pecatonica River at Freeport. * WHEN...Until early Wednesday 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 Saturday the stage was 13.2 feet and rising slowly. - Forecast...The river is expected to rise to a crest of 13.3 feet just after midnight tonight. It will then fall below flood stage Tuesday evening. - Flood stage is 13.0 feet.
Severity:  Severe    Effective:  April 18, 2026, 8:01 pm      Expires:  April 19, 2026, 8:15 pm
Area:  Stephenson, IL


Flood Warning issued April 18 at 7:59PM CDT by NWS Chicago IL

Summary: ...Forecast flooding changed from Minor to Moderate severity and increased in duration for the following rivers in Illinois... Pecatonica River near Shirland affecting Winnebago County. * WHAT...Minor flooding is occurring and moderate flooding is forecasted to occur. * 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 7:00 PM CDT Saturday the stage was 13.2 feet. - Forecast...The river is expected to rise to a crest near 14.0 feet (Moderate Stage) early Monday morning. It is expected to slowly fall thereafter through next week. - Flood stage is 12.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 7:59 pm      Expires:  April 19, 2026, 2:00 pm
Area:  Winnebago, IL


Flood Warning issued April 18 at 7:57PM CDT until April 21 at 1:00PM CDT by NWS Chicago IL

Summary: ...The Flood Warning continues for the following rivers in Illinois... Kishwaukee River near Perryville affecting Winnebago County. * WHAT...Minor flooding is occurring and expected to continue. * WHERE...Kishwaukee River from Confluence with South Branch Kishwaukee River downstream to the Rock River, including the Perryville gauge. * WHEN...Until early Tuesday afternoon. * IMPACTS...At 13.0 feet, Roadways threatened at Blackhawk Valley Campground south of Rockford. * ADDITIONAL DETAILS... - At 7:30 PM CDT Saturday the stage was 13.6 feet. - Forecast...The river is expected to rise to a crest near 14.0 feet tomorrow morning, and then fall below flood stage at some point Tuesday. - Flood stage is 12.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 7:57 pm      Expires:  April 19, 2026, 2:00 pm
Area:  Winnebago, IL


Flood Warning issued April 18 at 7:57PM CDT until April 20 at 11:30PM CDT by NWS Chicago IL

Summary: ...Forecast flooding changed from Minor to Moderate severity and increased in duration for the following rivers in Illinois... Kishwaukee River at Belvidere affecting Boone and Winnebago Counties. * WHAT...Minor flooding is occurring and moderate flooding is forecasted to occur. * WHERE...Kishwaukee River from County Line Road downstream to confluence with South Branch Kishwaukee River, including the Belvidere gauge. * WHEN...Until late Monday evening. * IMPACTS...At 10.0 feet, Trails in Spencer Park threatened. Parking lots threatened in Belvidere Park. * ADDITIONAL DETAILS... - At 7:30 PM CDT Saturday the stage was 9.8 feet. - Forecast...The river is expected to rise to a crest near 10.0 feet (Moderate Stage) tomorrow morning. It is then expected to fall below flood stage at some point on Monday. - Flood stage is 9.0 feet. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 7:57 pm      Expires:  April 19, 2026, 2:00 pm
Area:  Boone, IL; Winnebago, IL


Flood Warning issued April 18 at 3:56PM CDT until April 20 at 8:30AM CDT by NWS Milwaukee/Sullivan WI

Summary: ...The Flood Warning is extended for the following rivers in Wisconsin... Milwaukee River Near Cedarburg affecting Ozaukee County. Root River At Racine affecting Racine County. Root River Canal At Raymond affecting Racine County. ...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Sheboygan River At Sheboygan affecting Sheboygan County. Rock River Near Lake Koshkonong affecting Rock and Jefferson Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Afton affecting Rock and Winnebago Counties. Baraboo River Near Baraboo affecting Columbia and Sauk Counties. Rock River At Jefferson affecting Jefferson County. Rock River At Watertown affecting Jefferson County. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. Fox River Near Berlin affecting Green Lake County. Crawfish River At Milford affecting Jefferson County. Fox River Lower At Waukesha affecting Waukesha County. Fox River Lower Near New Munster affecting Kenosha and Lake Counties. Pecatonica River At Martintown affecting Green County. Root River At Franklin affecting Milwaukee County. Sugar River At Brodhead affecting Rock, Winnebago and Green Counties. Turtle Creek Near Clinton affecting Rock and Winnebago Counties. Wisconsin River At Portage affecting Columbia County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Turtle Creek near Clinton. * WHEN...Until Monday morning. * IMPACTS...At 10.0 feet, South Creek Rd threatened north of Inman Parkway east of Beloit. Low-lying private roadways threatened west of Shopiere. Yards of residential structures inundated along Mocassin Trail, Bootmaker Dr, East Ridge Rd, Boulder Lane, Rockfence Lane, and Arrowhead Rd in Beloit. * ADDITIONAL DETAILS... - At 3:00 PM CDT Saturday the stage was 8.3 feet. - Bankfull stage is 6.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 PM CDT Saturday was 8.5 feet. - Forecast...The river is expected to rise to a crest of 9.8 feet this evening. It will then fall below flood stage tomorrow evening. - Flood stage is 8.0 feet. - Flood History...This crest compares to a previous crest of 9.6 feet on 08/20/2007. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 3:56 pm      Expires:  April 19, 2026, 4:00 am
Area:  Winnebago, IL; Rock, WI


Flood Warning issued April 18 at 3:56PM CDT by NWS Milwaukee/Sullivan WI

Summary: ...The Flood Warning is extended for the following rivers in Wisconsin... Milwaukee River Near Cedarburg affecting Ozaukee County. Root River At Racine affecting Racine County. Root River Canal At Raymond affecting Racine County. ...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Sheboygan River At Sheboygan affecting Sheboygan County. Rock River Near Lake Koshkonong affecting Rock and Jefferson Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Afton affecting Rock and Winnebago Counties. Baraboo River Near Baraboo affecting Columbia and Sauk Counties. Rock River At Jefferson affecting Jefferson County. Rock River At Watertown affecting Jefferson County. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. Fox River Near Berlin affecting Green Lake County. Crawfish River At Milford affecting Jefferson County. Fox River Lower At Waukesha affecting Waukesha County. Fox River Lower Near New Munster affecting Kenosha and Lake Counties. Pecatonica River At Martintown affecting Green County. Root River At Franklin affecting Milwaukee County. Sugar River At Brodhead affecting Rock, Winnebago and Green Counties. Turtle Creek Near Clinton affecting Rock and Winnebago Counties. Wisconsin River At Portage affecting Columbia County. * WHAT...Major flooding is occurring and major flooding is forecast. * WHERE...Fox River Lower near New Munster. * WHEN...Until further notice. * IMPACTS...At 16.0 feet, Many county highways are closed or impassable. Highway 50 is closed. There is widespread flooding in the Town of Wheatland and Village of Salem Lakes, including Trevor. Some homes near the riverhave 1-2 ft of water on their main levels. * ADDITIONAL DETAILS... - At 3:00 PM CDT Saturday the stage was 14.8 feet. - Bankfull stage is 10.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 PM CDT Saturday was 14.8 feet. - Forecast...The river is expected to rise to a crest of 15.8 feet tomorrow evening. - Flood stage is 11.0 feet. - Flood History...This crest compares to a previous crest of 15.2 feet on 06/15/2008. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 3:56 pm      Expires:  April 19, 2026, 4:00 am
Area:  Lake, IL; Kenosha, WI


Flood Warning issued April 18 at 3:56PM CDT by NWS Milwaukee/Sullivan WI

Summary: ...The Flood Warning is extended for the following rivers in Wisconsin... Milwaukee River Near Cedarburg affecting Ozaukee County. Root River At Racine affecting Racine County. Root River Canal At Raymond affecting Racine County. ...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Sheboygan River At Sheboygan affecting Sheboygan County. Rock River Near Lake Koshkonong affecting Rock and Jefferson Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Afton affecting Rock and Winnebago Counties. Baraboo River Near Baraboo affecting Columbia and Sauk Counties. Rock River At Jefferson affecting Jefferson County. Rock River At Watertown affecting Jefferson County. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. Fox River Near Berlin affecting Green Lake County. Crawfish River At Milford affecting Jefferson County. Fox River Lower At Waukesha affecting Waukesha County. Fox River Lower Near New Munster affecting Kenosha and Lake Counties. Pecatonica River At Martintown affecting Green County. Root River At Franklin affecting Milwaukee County. Sugar River At Brodhead affecting Rock, Winnebago and Green Counties. Turtle Creek Near Clinton affecting Rock and Winnebago Counties. Wisconsin River At Portage affecting Columbia County. * WHAT...Moderate flooding is occurring and major flooding is forecast. * WHERE...Rock River at Afton. * WHEN...Until further notice. * IMPACTS...At 12.2 feet, There is widespread flooding in the Afton and Janesville areas. Numerous roads and streets adjacent to the river are closed including South River Road on the south side of Janesville, several blocks of Joseph and Charles Streets, a portion of Main Street, and North Loop Road at Traxler Park. The on-ramp to Memorial Drive is closed as is a portion of Riverside Drive. Traxler Park off of Memorial Drive in Janesville is flooded and closed. * ADDITIONAL DETAILS... - At 3:00 PM CDT Saturday the stage was 11.2 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 PM CDT Saturday was 12.1 feet. - Forecast...The river is expected to rise to 12.3 feet Friday evening. Additional rises are possible thereafter. - Flood stage is 9.0 feet. - Flood History...This crest compares to a previous crest of 12.2 feet on 01/23/2008. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 3:56 pm      Expires:  April 19, 2026, 4:00 am
Area:  Winnebago, IL; Rock, WI


Flood Warning issued April 18 at 3:56PM CDT until April 20 at 5:00PM CDT by NWS Milwaukee/Sullivan WI

Summary: ...The Flood Warning is extended for the following rivers in Wisconsin... Milwaukee River Near Cedarburg affecting Ozaukee County. Root River At Racine affecting Racine County. Root River Canal At Raymond affecting Racine County. ...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Sheboygan River At Sheboygan affecting Sheboygan County. Rock River Near Lake Koshkonong affecting Rock and Jefferson Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Afton affecting Rock and Winnebago Counties. Baraboo River Near Baraboo affecting Columbia and Sauk Counties. Rock River At Jefferson affecting Jefferson County. Rock River At Watertown affecting Jefferson County. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. Fox River Near Berlin affecting Green Lake County. Crawfish River At Milford affecting Jefferson County. Fox River Lower At Waukesha affecting Waukesha County. Fox River Lower Near New Munster affecting Kenosha and Lake Counties. Pecatonica River At Martintown affecting Green County. Root River At Franklin affecting Milwaukee County. Sugar River At Brodhead affecting Rock, Winnebago and Green Counties. Turtle Creek Near Clinton affecting Rock and Winnebago Counties. Wisconsin River At Portage affecting Columbia County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Sugar River at Brodhead. * WHEN...Until Monday afternoon. * IMPACTS...At 7.5 feet, There is widespread agricultural and lowland flooding in the Brodhead area. Downstream in the Avon Bottoms area of Rock County, there is flooding in Sugar River Park, Beloit Newark Rd and S Hopkins Rd. In Illinois, Winslow Rd is threatened near the river between Durand and Shirland. Low lying areas of Sugar Shores Camping Resort may be inundated. * ADDITIONAL DETAILS... - At 3:00 PM CDT Saturday the stage was 7.6 feet. - Bankfull stage is 4.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 PM CDT Saturday was 8.3 feet. - Forecast...The river is expected to fall below flood stage late Monday morning and continue falling to 2.2 feet Saturday, April 25. - Flood stage is 5.0 feet. - Flood History...This crest compares to a previous crest of 7.6 feet on 03/13/1928. - http://www.weather.gov/safety/flood
Severity:  Severe    Effective:  April 18, 2026, 3:56 pm      Expires:  April 19, 2026, 4:00 am
Area:  Winnebago, IL; Green, WI; Rock, WI


Flood Warning issued April 18 at 2:20PM CDT until April 25 at 1:00PM CDT by NWS Chicago IL

Summary: * WHAT...Flooding caused by excessive rainfall is expected. * WHERE...A portion of northeast Illinois, including the following counties, Lake IL and McHenry. * WHEN...Until 100 PM CDT Saturday Apr 25. * IMPACTS...Numerous roads, yards, structures, and park land are expected to flood along the Fox River Chain of Lakes. * ADDITIONAL DETAILS... - At 145 PM CDT, River gauges along the Fox River Chain of Lakes indicated slowly rises water levels due to recent rainfall across the area. - Water levels may near major flood stage by the middle of next week and remain above flood stage potentially for several weeks. Impacts from this flood may be similar to those experienced in May of 1973, October of 1986, or June of 2008. - 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 18, 2026, 2:20 pm      Expires:  April 25, 2026, 1:00 pm
Area:  Lake, IL; McHenry, IL


Frost Advisory issued April 18 at 1:48PM CDT until April 19 at 8:00AM CDT by NWS Lincoln IL

Summary: * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Portions of central, east central, southeast, and west central Illinois. * WHEN...From 1 AM to 8 AM CDT Sunday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
Severity:  Minor    Effective:  April 18, 2026, 1:48 pm      Expires:  April 19, 2026, 5:00 am
Area:  Schuyler; Cass; Menard; Scott; Morgan; Sangamon; Christian; Macon; Moultrie; Douglas; Coles; Edgar; Shelby; Cumberland; Clark; Effingham; Jasper; Crawford; Clay; Richland; Lawrence


Freeze Watch issued April 18 at 1:48PM CDT until April 20 at 8:00AM CDT by NWS Lincoln IL

Summary: * WHAT...For the Frost Advisory, temperatures as low as 34 will result in frost formation. For the Freeze Watch, sub-freezing temperatures as low as 30 possible. * WHERE...Portions of central, east central, and west central Illinois. * WHEN...For the Frost Advisory, from 1 AM to 8 AM CDT Sunday. For the Freeze Watch, from late Sunday night through Monday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
Severity:  Severe    Effective:  April 18, 2026, 1:48 pm      Expires:  April 19, 2026, 5:00 am
Area:  Knox; Stark; Peoria; Marshall; Woodford; Fulton; Tazewell; McLean; Mason; Logan; De Witt; Piatt; Champaign; Vermilion


Frost Advisory issued April 18 at 1:48PM CDT until April 19 at 8:00AM CDT by NWS Lincoln IL

Summary: * WHAT...For the Frost Advisory, temperatures as low as 34 will result in frost formation. For the Freeze Watch, sub-freezing temperatures as low as 30 possible. * WHERE...Portions of central, east central, and west central Illinois. * WHEN...For the Frost Advisory, from 1 AM to 8 AM CDT Sunday. For the Freeze Watch, from late Sunday night through Monday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
Severity:  Minor    Effective:  April 18, 2026, 1:48 pm      Expires:  April 19, 2026, 5:00 am
Area:  Knox; Stark; Peoria; Marshall; Woodford; Fulton; Tazewell; McLean; Mason; Logan; De Witt; Piatt; Champaign; Vermilion