Snow and chilly temperatures have already greeted some Thanksgiving travelers and plenty more could be on its way this holiday weekend, with winter storm warnings Saturday across much of the northern part of the country.

A major winter storm will produce snow and gusty winds throughout the Midwest through the Western Great Lakes, the National Weather Service said . The storm is expected to bring snow and cold, peaking on Saturday and then tapering off sometime on Sunday morning. More than a foot of snow is expected in portions of Iowa, Illinois, Wisconsin and Michigan.

Up to 54 million people are under winter weather alerts, CBS News Philadelphia meteorologist Andrew Kozak said, as the system moves across the northern Plains. Arctic air is driving temperatures into the teens and 20s

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