Winter weather-related alerts from the National Weather Service (NWS) span swaths of the northern U.S. early Friday, as a major winter storm is expected to impact parts of the Northern Plains, Upper Midwest and Great Lakes through the weekend .

Why It Matters

Forecasters warn that heavy snowfall from the storm will lead to hazardous post-Thanksgiving travel—as the American Automobile Association expects over 80 million people to travel at least 50 miles from home over the November 25 to December 1 period.

What To Know

Winter storm warnings—issued by the NWS when “a significant combination of hazardous winter weather is occurring or imminent”—are in effect across much of Montana, parts of South Dakota and Nebraska, southern Minnesota, almost the entirety of Iowa, northeast Missouri,

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