For the third day in a row, the Chicago area is under a threat for severe weather, with multiple rounds of storms possible in the region Saturday. The biggest threat for severe storms will come Saturday evening,

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.