Waning cold followed by a threat of snow

Chicago’s current cold snap will begin to ease Tuesday as temperatures creep back into the 20s after four days with highs in the 10º to 15º range as the massive arctic high pressure area that brought the cold weather moves to the eastern United States.
That arctic high brought the coldest weather in nearly a decade to portions of the northern Plains and upper Midwest. One of the coldest spots has been Aberdeen, S.D., where record weekend cold sent lows to -35º on Friday, -25º Saturday and -30º Sunday.
The price for warmer weather will be an increasing threat of snow as a series of storm systems move across the Midwest. The first system should primarily affect areas north of Chicago Tuesday night and Wednesday, but the next system arriving Thursday night should track further south and could bring several inches of snow to Chicago before it moves east of the area early Saturday.