The Chicago area faces an increased risk of major flooding as another round of thunderstorms is set to bring torrential rainfall to parts of the region through Saturday morning.
Widespread flash flooding could begin as early as late Friday night, with the National Weather Service saying localized rainfall rates may exceed three inches per hour.
As a result, a flash flood watch effect takes effect at 10 p.m. and continues through Saturday morning for portions of DeKalb, Grundy Kankakee, Kane, Kendall, DuPage, Cook and Will counties. Lake, Porter, Newton and Jasper counties in northwest Indiana are also included.
Another round of thunderstorms will bring more torrential rainfall to parts of the area late tonight through Saturday morning. Instances of flash flooding may result, especially south of I-80 where there are concerns for possible widespread flash flooding. #ILwx #INwx pic.twitter.com/atKppQZwjR— NWS Chicago (@NWSChicago) August 14, 2026
According to the NWS, residents should expect flooded roads and flooding in low-lying areas, fields, yards and areas with poor drainage. Roads may become impassive, while underpasses and viaducts may flood as well.
Localized flash flooding is possible, particularly south of I-80, where meteorologists are concerned about the possibility of widespread flash flooding.
Along with the flooding threat, more thunderstorms are expected to develop, with the most widespread activity along and south of Interstate 88. Furthermore, locally damaging winds cannot be ruled out.
Heavy is possible early Saturday through most of the Chicago area, though chances will be lower in Lake and McHenry counties, NBC 5 Storm Team Meteorologist Kevin Jeanes said.
The threat of potential severe weather may not end there.
Scattered showers and thunderstorms may continue into the afternoon on Saturday, with drier weather taking hold in the evening.
A strong-to-severe storm is then possible Saturday night through early Sunday morning.
The Chicago area faces an increased risk of major flooding as another round of thunderstorms is set to bring torrential rainfall to parts of the region through Saturday morning.
Widespread flash flooding could begin as early as late Friday night, with the National Weather Service saying localized rainfall rates may exceed three inches per hour.
As a result, a flash flood watch effect takes effect at 10 p.m. and continues through Saturday morning for portions of DeKalb, Grundy Kankakee, Kane, Kendall, DuPage, Cook and Will counties. Lake, Porter, Newton and Jasper counties in northwest Indiana are also included.
Another round of thunderstorms will bring more torrential rainfall to parts of the area late tonight through Saturday morning. Instances of flash flooding may result, especially south of I-80 where there are concerns for possible widespread flash flooding. #ILwx #INwx pic.twitter.com/atKppQZwjR
— NWS Chicago (@NWSChicago) August 14, 2026
According to the NWS, residents should expect flooded roads and flooding in low-lying areas, fields, yards and areas with poor drainage. Roads may become impassive, while underpasses and viaducts may flood as well.
Localized flash flooding is possible, particularly south of I-80, where meteorologists are concerned about the possibility of widespread flash flooding.
Along with the flooding threat, more thunderstorms are expected to develop, with the most widespread activity along and south of Interstate 88. Furthermore, locally damaging winds cannot be ruled out.
Heavy is possible early Saturday through most of the Chicago area, though chances will be lower in Lake and McHenry counties, NBC 5 Storm Team Meteorologist Kevin Jeanes said.
The threat of potential severe weather may not end there.
Scattered showers and thunderstorms may continue into the afternoon on Saturday, with drier weather taking hold in the evening.
A strong-to-severe storm is then possible Saturday night through early Sunday morning.