CHICAGO - Several brief tornadoes were reported as severe thunderstorms with damaging hail moved through the Chicago area late Monday afternoon, according to meteorologists.
Storms that caused hail and downpours moved across the area between 15 and 20 mph, prompting a severe thunderstorm warning that went in effect in Cook and DuPage counties until 8 p.m., according to the National Weather Service.
Two rounds of thunderstorms Monday brought with them significant rainfall across portions of northern Illinois, the weather service said. During the afternoon and evening hours, thunderstorms grew to supercells that produced numerous tornados, some of which caused tree and structural damage in portions of Ogle DeKalb, and Kane counties.
The system was expected to move through Rockford, Elgin, Joliet, Waukegan, Chicago, northwest Indiana and other areas near the lakefront, the weather service said. Storms were expected to move out of the area by midnight.
More storms could be in store for Tuesday, mainly after 1 p.m., according to the weather service. Temperatures were also expected to climb into the 90s Tuesday.
The rest of the week will stay hot, with high temps above 85 degrees Wednesday and Thursday before a slight cool down on Friday.
Heat advisories also were in effect until Tuesday night across north-central Illinois, northeast Illinois and northwest Indiana, the weather service said.
Heat indexes of 102-108 degrees Fahrenheit (38.8-42.2 Celsius) were expected with the highest to south and west of Chicago.
The Associated Press contributed to this report.