Chicago, Illinois
Regional Weather Alerts
| Alert: | Special Weather Statement |
| Area(s): | Winnebago; Boone; McHenry; Ogle; Lee; De Kalb; Kane; DuPage; Kendall; Grundy; Kankakee; Southern Cook; Northern Will; Southern Will; Eastern Will; Lake; Porter; Newton; Jasper |
| Effective: | 2026-08-19 @ 5:30 am -> 2026-08-19 @ 8:00 am |
| Onset: | 2026-08-19 @ 5:30 am |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Chicago IL on 2026-08-19 @ 5:30 am |
| Headline: | Special Weather Statement issued August 19 at 5:30AM CDT by NWS Chicago IL |
| Description: |
Shallow fog has developed early this morning across portions of the area outside of Chicago and may expand in coverage. Some fog has become locally dense, with visibilities down to one quarter mile or less, especially in low lying areas and near open fields. Conditions will gradually improve after sunrise. If traveling early this morning, be prepared for sudden reductions in visibility over short distances. Slow down, use low beam headlights and increase following distances in fog. Be especially cautious in school zones. |
| Alert: | Special Weather Statement |
| Area(s): | Buchanan; Delaware; Dubuque; Benton; Linn; Jones; Jackson; Iowa; Johnson; Cedar; Clinton; Jo Daviess; Stephenson; Carroll; Whiteside |
| Effective: | 2026-08-19 @ 4:02 am -> 2026-08-19 @ 7:30 am |
| Onset: | 2026-08-19 @ 4:02 am |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Quad Cities IA IL on 2026-08-19 @ 4:02 am |
| Headline: | Special Weather Statement issued August 19 at 4:02AM CDT by NWS Quad Cities IA IL |
| Description: |
Areas of fog, dense in spots with visibilities under one half mile can be expected early this morning. If traveling early this morning, be prepared for fog that could bring sudden and significant reductions in visibility over short distances. If you encounter dense fog, slow down, give yourself plenty of braking distance between other vehicles, and be sure to keep headlights on low beam. Be especially cautious in school zones. |
| Alert: | Flood Watch |
| Area(s): | Livingston; Iroquois; Ford; Benton |
| Effective: | 2026-08-19 @ 2:56 am -> 2026-08-19 @ 12:00 pm |
| Onset: | 2026-08-19 @ 1:00 pm -> 2026-08-20 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Chicago IL on 2026-08-19 @ 2:56 am |
| Headline: | Flood Watch issued August 19 at 2:56AM CDT until August 20 at 1:00AM CDT by NWS Chicago IL |
| Description: |
* WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Portions of Illinois, including the following counties, Ford, Iroquois and Livingston and northwest Indiana, including the following county, Benton. * WHEN...From 1 PM CDT /2 PM EDT/ this afternoon through late tonight. * IMPACTS...Creeks and streams may rise out of their banks. Roads and streets may be flooded. * ADDITIONAL DETAILS... - A narrow west to east oriented corridor of training showers and thunderstorms may develop this afternoon through the evening where recent heavy rains have left the area more susceptible to flooding. Rainfall rates may locally exceed 1 to 2 inches which may lead to flooding where storms move repeatedly over the same areas. - http://www.weather.gov/safety/flood |
| Alert: | Flood Watch |
| Area(s): | Knox; Stark; Peoria; Marshall; Woodford; Fulton; Tazewell; McLean; Mason; Logan; De Witt; Piatt; Champaign; Vermilion; Menard; Macon |
| Effective: | 2026-08-19 @ 2:35 am -> 2026-08-19 @ 3:00 pm |
| Onset: | 2026-08-19 @ 1:00 pm -> 2026-08-20 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Lincoln IL on 2026-08-19 @ 2:35 am |
| Headline: | Flood Watch issued August 19 at 2:35AM CDT until August 20 at 1:00AM CDT by NWS Lincoln IL |
| Description: |
* WHAT...Flooding caused by excessive rainfall is possible. * WHERE...Portions of central, east central, and west central Illinois, including the following counties, in central Illinois, De Witt, Logan, Macon, Marshall, Mason, McLean, Menard, Peoria, Piatt, Stark, Tazewell and Woodford. In east central Illinois, Champaign and Vermilion. In west central Illinois, Fulton and Knox. * WHEN...From 1 PM CDT this afternoon through late tonight. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - A narrow band of showers and/or thunderstorms are forecast to set up in a west-east orientation across central IL, where the flooding and very heavy rain occurred late last week, this afternoon into the late evening. Pockets of 2-5 inches are possible locally. - http://www.weather.gov/safety/flood |
| Alert: | Flood Warning |
| Area(s): | Brown, IL; Cass, IL; Morgan, IL; Schuyler, IL |
| Effective: | 2026-08-18 @ 8:25 pm -> 2026-08-19 @ 12:30 pm |
| Onset: | 2026-08-18 @ 8:25 pm |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Immediate |
| Issued By: | NWS Lincoln IL on 2026-08-18 @ 8:25 pm |
| Headline: | Flood Warning issued August 18 at 8:25PM CDT by NWS Lincoln IL |
| Description: |
...The Flood Warning continues for the following rivers in Illinois... Illinois River at Beardstown affecting Schuyler, Brown, Morgan and Cass Counties. Illinois River near Havana affecting Fulton, Cass and Mason 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 Tuesday the stage was 14.7 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 7:45 PM CDT Tuesday was 14.7 feet. - Forecast...The river is expected to rise to 16.3 feet Saturday evening. Additional rises are possible thereafter. - Flood stage is 14.0 feet. - http://www.weather.gov/safety/flood |
| Alert: | Flood Warning |
| Area(s): | Cass, IL; Fulton, IL; Mason, IL |
| Effective: | 2026-08-18 @ 8:25 pm -> 2026-08-19 @ 12:30 pm |
| Onset: | 2026-08-18 @ 8:25 pm |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Immediate |
| Issued By: | NWS Lincoln IL on 2026-08-18 @ 8:25 pm |
| Headline: | Flood Warning issued August 18 at 8:25PM CDT by NWS Lincoln IL |
| Description: |
...The Flood Warning continues for the following rivers in Illinois... Illinois River at Beardstown affecting Schuyler, Brown, Morgan and Cass Counties. Illinois River near Havana affecting Fulton, Cass and Mason 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 Tuesday the stage was 16.3 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 7:45 PM CDT Tuesday was 16.3 feet. - Forecast...The river is expected to rise to a crest of 16.5 feet early Thursday morning. - Flood stage is 14.0 feet. - http://www.weather.gov/safety/flood |
| Alert: | Flood Warning |
| Area(s): | Bureau, IL; La Salle, IL; Putnam, IL |
| Effective: | 2026-08-18 @ 8:24 pm -> 2026-08-19 @ 9:00 am |
| Onset: | 2026-08-18 @ 8:24 pm -> 2026-08-19 @ 9:00 am |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Immediate |
| Issued By: | NWS Chicago IL on 2026-08-18 @ 8:24 pm |
| Headline: | Flood Warning issued August 18 at 8:24PM CDT until August 19 at 9:00AM CDT by NWS Chicago IL |
| Description: |
...The Flood Warning is extended for the following rivers in Illinois... Illinois River at La Salle affecting Putnam, Bureau and La Salle Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Illinois River from Starved Rock Lock and Dam downstream to confluence with Big Bureau Creek, including the La Salle gauge. * WHEN...Until Wednesday morning. * IMPACTS...At 20.0 feet, Agricultural areas in La Salle, Spring Valley, and Peru are inundated. * ADDITIONAL DETAILS... - At 7:45 PM CDT Tuesday the stage was 20.3 feet. - Forecast...The river is expected to fall below flood stage early Wednesday morning and continue falling. - Flood stage is 20.0 feet. - http://www.weather.gov/safety/flood |
| Alert: | Flood Warning |
| Area(s): | Piatt, IL |
| Effective: | 2026-08-18 @ 8:23 pm -> 2026-08-19 @ 12:30 pm |
| Onset: | 2026-08-18 @ 8:23 pm -> 2026-08-21 @ 5:00 am |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Immediate |
| Issued By: | NWS Lincoln IL on 2026-08-18 @ 8:23 pm |
| Headline: | Flood Warning issued August 18 at 8:23PM CDT until August 21 at 5:00AM CDT by NWS Lincoln IL |
| Description: |
...The Flood Warning continues for the following rivers in Illinois... Sangamon River at Monticello affecting Piatt County. .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...Sangamon River at Monticello. * WHEN...Until early Friday morning. * ADDITIONAL DETAILS... - At 8:00 PM CDT Tuesday the stage was 16.9 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:00 PM CDT Tuesday was 17.3 feet. - Forecast...The river is expected to fall below flood stage late Thursday evening and continue falling to 9.6 feet Tuesday, August 25. - Flood stage is 13.0 feet. - http://www.weather.gov/safety/flood |
| Alert: | Flood Warning |
| Area(s): | Fulton, IL |
| Effective: | 2026-08-18 @ 8:21 pm -> 2026-08-19 @ 12:30 pm |
| Onset: | 2026-08-18 @ 8:21 pm -> 2026-08-19 @ 1:55 pm |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Immediate |
| Issued By: | NWS Lincoln IL on 2026-08-18 @ 8:21 pm |
| Headline: | Flood Warning issued August 18 at 8:21PM CDT until August 19 at 1:55PM CDT by NWS Lincoln IL |
| Description: |
...The Flood Warning is extended for the following rivers in Illinois... Spoon River at Seville affecting Fulton County. .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...Spoon River at Seville. * WHEN...Until early tomorrow afternoon. * IMPACTS...At 23.0 feet, Easterly access road to Seville inundated. * ADDITIONAL DETAILS... - At 7:45 PM CDT Tuesday the stage was 23.8 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 7:45 PM CDT Tuesday was 24.7 feet. - Forecast...The river is expected to fall below flood stage tomorrow morning and continue falling to 10.1 feet Tuesday, August 25. - Flood stage is 22.0 feet. - http://www.weather.gov/safety/flood |
| Alert: | Flood Warning |
| Area(s): | Clark, IL; Crawford, IL; Sullivan, IN; Vigo, IN |
| Effective: | 2026-08-18 @ 6:48 pm -> 2026-08-19 @ 1:00 pm |
| Onset: | 2026-08-18 @ 6:48 pm -> 2026-08-25 @ 10:36 pm |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Immediate |
| Issued By: | NWS Indianapolis IN on 2026-08-18 @ 6:48 pm |
| Headline: | Flood Warning issued August 18 at 7:48PM EDT until August 25 at 11:36PM EDT by NWS Indianapolis IN |
| Description: |
...The Flood Warning is extended for the following rivers in Indiana...Illinois... Wabash River at Covington down to Vincennes. ...The Flood Warning continues for the following rivers in Indiana... Wabash River at Lafayette. .Heavy to extreme rainfall across northern central Indiana since last week has produced minor to moderate flooding along most of the Wabash River from Lafayette down to Riverton...with the crest in moderate flood currently passing Montezuma. Moderate flooding will end at Covington pre-dawn Wednesday...while starting at Terre Haute. Flooding will end at Lafayette by midday Wednesday...with flooding starting at Vincennes by early Thursday. * WHAT...Minor flooding is occurring and moderate flooding is forecast. * WHERE...Wabash River at Terre Haute. * WHEN...Until Tuesday, August 25. * IMPACTS...At 25.0 feet, Extensive flooding is in progress. Greenfield Bayou levee may leak. South Lake area extensively floods. Many local roads are under several feet of water. * ADDITIONAL DETAILS... - At 7:30 PM EDT Tuesday /6:30 PM CDT Tuesday/ the stage was 23.9 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 7:30 PM EDT Tuesday /6:30 PM CDT Tuesday/ was 23.9 feet. - Forecast...The river is expected to rise to a crest of 25.1 feet early Thursday afternoon. It will then fall below flood stage Tuesday, August 25. - Flood stage is 16.5 feet. - http://www.weather.gov/safety/flood |
| Alert: | Flood Warning |
| Area(s): | Crawford, IL; Lawrence, IL; Knox, IN; Sullivan, IN |
| Effective: | 2026-08-18 @ 6:48 pm -> 2026-08-19 @ 1:00 pm |
| Onset: | 2026-08-18 @ 6:48 pm -> 2026-08-28 @ 12:24 am |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Immediate |
| Issued By: | NWS Indianapolis IN on 2026-08-18 @ 6:48 pm |
| Headline: | Flood Warning issued August 18 at 7:48PM EDT until August 28 at 1:24AM EDT by NWS Indianapolis IN |
| Description: |
...The Flood Warning is extended for the following rivers in Indiana...Illinois... Wabash River at Covington down to Vincennes. ...The Flood Warning continues for the following rivers in Indiana... Wabash River at Lafayette. .Heavy to extreme rainfall across northern central Indiana since last week has produced minor to moderate flooding along most of the Wabash River from Lafayette down to Riverton...with the crest in moderate flood currently passing Montezuma. Moderate flooding will end at Covington pre-dawn Wednesday...while starting at Terre Haute. Flooding will end at Lafayette by midday Wednesday...with flooding starting at Vincennes by early Thursday. * WHAT...Minor flooding is occurring and moderate flooding is forecast. * WHERE...Wabash River at Riverton. * WHEN...Until Friday, August 28. * IMPACTS...At 22.0 feet, Flooding becomes more serious. Water is approaching critical levels on most levees. Flooding enters some river cabins. Flooding is at the outskirts of Palestine and Russellville, Illinois. Flood waters near Illinois 33 between Palestine and Hutsonville, Illinois. Many local river roads are flooded. * ADDITIONAL DETAILS... - At 7:00 PM EDT Tuesday /6:00 PM CDT Tuesday/ the stage was 17.8 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 7:00 PM EDT Tuesday /6:00 PM CDT Tuesday/ was 17.8 feet. - Forecast...The river is expected to rise to a crest of 22.0 feet Saturday evening. It will then fall below flood stage Thursday, August 27. - Flood stage is 15.0 feet. - http://www.weather.gov/safety/flood |
| Alert: | Flood Warning |
| Area(s): | Crawford, IL; Lawrence, IL; Knox, IN; Sullivan, IN |
| Effective: | 2026-08-18 @ 6:48 pm -> 2026-08-19 @ 1:00 pm |
| Onset: | 2026-08-18 @ 6:48 pm -> 2026-08-28 @ 4:00 am |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Immediate |
| Issued By: | NWS Indianapolis IN on 2026-08-18 @ 6:48 pm |
| Headline: | Flood Warning issued August 18 at 7:48PM EDT until August 28 at 5:00AM EDT by NWS Indianapolis IN |
| Description: |
...The Flood Warning is extended for the following rivers in Indiana...Illinois... Wabash River at Covington down to Vincennes. ...The Flood Warning continues for the following rivers in Indiana... Wabash River at Lafayette. .Heavy to extreme rainfall across northern central Indiana since last week has produced minor to moderate flooding along most of the Wabash River from Lafayette down to Riverton...with the crest in moderate flood currently passing Montezuma. Moderate flooding will end at Covington pre-dawn Wednesday...while starting at Terre Haute. Flooding will end at Lafayette by midday Wednesday...with flooding starting at Vincennes by early Thursday. * WHAT...Minor flooding is forecast. * WHERE...Wabash River at Hutsonville Legacy Power Plant Site. * WHEN...Until Friday, August 28. * IMPACTS...At 23.8 feet, Ball field in Hutsonville is extensively flooded. Blacktop road that runs along the Wabash River from Hutsonville to Palestine is still above flood waters. Most all of the roads leading from this road to the Wabash are underwater, some by several feet of water. * ADDITIONAL DETAILS... - There is no current observed data. - Forecast...The river is expected to rise to a crest of 23.5 feet early Saturday afternoon. It will then fall below flood stage Thursday, August 27. - Flood stage is 16.0 feet. - http://www.weather.gov/safety/flood |
| Alert: | Flood Warning |
| Area(s): | Lawrence, IL; Wabash, IL; Knox, IN |
| Effective: | 2026-08-18 @ 6:48 pm -> 2026-08-19 @ 1:00 pm |
| Onset: | 2026-08-20 @ 1:00 am -> 2026-08-28 @ 11:48 am |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Immediate |
| Issued By: | NWS Indianapolis IN on 2026-08-18 @ 6:48 pm |
| Headline: | Flood Warning issued August 18 at 7:48PM EDT until August 28 at 12:48PM EDT by NWS Indianapolis IN |
| Description: |
...The Flood Warning is extended for the following rivers in Indiana...Illinois... Wabash River at Covington down to Vincennes. ...The Flood Warning continues for the following rivers in Indiana... Wabash River at Lafayette. .Heavy to extreme rainfall across northern central Indiana since last week has produced minor to moderate flooding along most of the Wabash River from Lafayette down to Riverton...with the crest in moderate flood currently passing Montezuma. Moderate flooding will end at Covington pre-dawn Wednesday...while starting at Terre Haute. Flooding will end at Lafayette by midday Wednesday...with flooding starting at Vincennes by early Thursday. * WHAT...Minor flooding is forecast. * WHERE...Wabash River at Vincennes. * WHEN...From late Wednesday night to Friday, August 28. * IMPACTS...At 21.0 feet, Extensive agricultural flooding in progress in areas that are not protected by levees. In Lawrence County Illinois, River Road is flooded from the Lincoln Memorial Bridge to the east edge of Billett. * ADDITIONAL DETAILS... - At 6:45 PM EDT Tuesday /5:45 PM CDT Tuesday/ the stage was 13.9 feet. - Forecast...The river is expected to rise above flood stage early Thursday morning to a crest of 21.0 feet Monday evening. It will then fall below flood stage Friday, August 28. - Flood stage is 16.0 feet. - http://www.weather.gov/safety/flood |