A broad swath of the US including much of the Northwest, Midwest and Northeast is under winter weather alerts, advisories, or warnings.
Chicago, Des Moines, Kansas City, Detroit, Cleveland, Pennsylvania, New York, and a wide band of the Northeast were all expecting 2, 4, or more inches of snow. with parts of upstate New York bracing for more than 4 feet of lake effect snow.
A separate storm system moving into the Pacific Northwest could dump up to 2 inches of snow on Seattle and then head east into Colorado Sunday night through Christmas Day.
In southeast Wyoming, the weather service warned that parts of I-80 could see up to 6 inches of snow early Monday morning, with 50 mph winds and whiteout conditions. A blizzard, in other words.