Issue date: 2026-09-20T03:06+00:00
* WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 7 to 10 ft expected. * WHERE...Lake IL, Northern Cook, and Central Cook Counties. * WHEN...From 7 AM CDT Sunday through Tuesday evening. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers.
Issue date: 2026-09-20T03:03+00:00
...The Flood Watch continues for the following rivers in Illinois... Des Plaines River near Russell affecting Lake IL zone. Des Plaines River near Des Plaines affecting Northern Cook and Central Cook zones. Des Plaines River near Gurnee affecting Lake IL zone. Des Plaines River at Riverside affecting Central Cook zone. Des Plaines River at Lincolnshire affecting Northern Cook and Lake IL zones. .The combination of heavy rain this morning and expected additional thunderstorms with heavy rain tonight may lead to river flooding along the Des Plaines River basin as early as Sunday morning. The heavy rain tonight is expected to occur along a roughly west to east axis across northern Illinois, though the exact location across the river basin remains uncertain. Flooding severity may be higher or lower over the basin depending on the ultimate placement of the highest rainfall tonight. * WHAT...Flooding is possible. * WHERE...Des Plaines River from Roosevelt Road in Forest Park downstream to Hodgkins, including the Riverside gauge. * WHEN...From Sunday morning to Tuesday morning. * ADDITIONAL DETAILS... - At 8:45 PM CDT Saturday the stage was 3.6 feet. - Forecast...Rises on the river are possible over the next few days. The river may reach flood stage. - Flood stage is 7.5 feet. - http://www.weather.gov/safety/flood
Issue date: 2026-09-20T03:03+00:00
...The Flood Watch continues for the following rivers in Illinois... Des Plaines River near Russell affecting Lake IL zone. Des Plaines River near Des Plaines affecting Northern Cook and Central Cook zones. Des Plaines River near Gurnee affecting Lake IL zone. Des Plaines River at Riverside affecting Central Cook zone. Des Plaines River at Lincolnshire affecting Northern Cook and Lake IL zones. .The combination of heavy rain this morning and expected additional thunderstorms with heavy rain tonight may lead to river flooding along the Des Plaines River basin as early as Sunday morning. The heavy rain tonight is expected to occur along a roughly west to east axis across northern Illinois, though the exact location across the river basin remains uncertain. Flooding severity may be higher or lower over the basin depending on the ultimate placement of the highest rainfall tonight. * WHAT...Flooding is possible. * WHERE...Des Plaines River from Townline Road in Libertyville downstream to Palatine Road in Prospect Heights, including the Lincolnshire gauge. * WHEN...From Sunday afternoon until further notice. * ADDITIONAL DETAILS... - At 8:45 PM CDT Saturday the stage was 8.3 feet. - Forecast...Rises on the river are possible over the next few days. The river may reach flood stage. - Flood stage is 12.5 feet. - http://www.weather.gov/safety/flood
Issue date: 2026-09-20T02:05+00:00
...The National Weather Service in Chicago has issued a Flood Warning for the following rivers in Illinois...Indiana... Little Calumet River at Munster (Hohman Avenue) affecting Lake IN and Cook Counties. * WHAT...Minor flooding is forecast. * WHERE...Little Calumet River from IN-912 in Hammond downstream to confluence with Thorn Creek in South Holland, including the Munster (Hohman Avenue) gauge. * WHEN...From early Sunday morning to late Sunday night. * IMPACTS...At 12.5 feet, Most areas outside of the levee-protected area are inundated in Hammond and Munster. * ADDITIONAL DETAILS... - At 8:00 PM CDT Saturday the stage was 6.7 feet. - Forecast...The river is expected to rise above flood stage early Sunday morning to a crest of 13.8 feet early tomorrow afternoon. It will then fall below flood stage late tomorrow evening. - Flood stage is 12.0 feet. - http://www.weather.gov/safety/flood
Issue date: 2026-09-20T01:23+00:00
* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Illinois, including the following areas, Boone, Central Cook, De Kalb, DuPage, Kane, Kendall, Lake IL, Lee, McHenry, Northern Cook, Northern Will, Ogle, Southern Cook and Winnebago and northwest Indiana, including the following areas, Lake IN and Porter. * WHEN...Until 7 AM CDT Sunday. * IMPACTS...Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Underpasses may be flooded. Roads and streets may be flooded. * ADDITIONAL DETAILS... - Another round of showers and thunderstorms is expected late this evening and overnight. Swaths of heavy to very heavy rainfall with 2+ inch per hour rainfall rates are likely to occur within the watch area and may result in areas of flash flooding and cause rapid rises on area rivers, creeks, and streams. - http://www.weather.gov/safety/flood