A Flash Flood Warning is in effect for the Chicago area as severe storms roll through, which also caused problems at O'Hare and Midway airports.

A heat advisory is in effect across the Chicago area today, with storm chances set to increase through the weekend.

Potentially dangerous storms accompanied by damaging winds and hail were possible in the Chicago area on Friday night.

A tornado watch was still in effect until 11 p.m. Friday for Cook County and northern Illinois, but the severe weather mainly stayed northwest of the Chicago area thanks to a line of cool, dense air that broke the storms up.

CHICAGO - A clash of air masses on Wednesday will result in the threat of severe storms from Milwaukee and Chicago westward to Denver and the eastern Rockies. The Storm Prediction Center has placed large parts of Illinois, Wisconsin, and Colorado under a "slight" risk of severe storms - a Level 2 out of 5 on its severe storm scale.

The Chicago area’s severe weather threat has diminished, but isolated showers are still possible Saturday evening.