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Chicago is in for some big weather changes this week with fall right around the corner.
After a mild weekend, a strong cold front moved through the area bringing increased cloud and rain.
Some storms Monday afternoon and evening, especially in areas north of Chicago, were severe.
Temperatures were expected to plunge into the 50s overnight into Tuesday. Far suburban sections might see patchy frost by Wednesday morning.
Temperatures are predicted to stick in the high 60s for most of the week and level back off to 70 by the weekend.
The first day of fall is Saturday.