Falling snow collected on the runways at Boston's Logan International Airport Monday, causing temporary flight delays.

The wind was so severe in Pennsylvania and New Jersey that the annual re-enactment of George Washington and his soldiers’ crossing the Delaware River was canceled, the Washington Crossing Historic Park told ABC News.

Temperatures in the Northeast overnight were expected to dip below zero in some places and rise slightly to the single digits and teens around Washington, D.C.

Midwest

?? HELLO SNOW! Brief burst of snow seen this Christmas Eve from Minnesota State University, #Mankato. #Snow #MNwx pic.twitter.com/viYpHY9Sb4

— Mark Tarello (@mark_tarello) December 25, 2017

Heavy lake effect snow fell in western Michigan and the Upper Peninsula of the state.

The National Weather Service has issued a wind-chill warning and advisory from Montana to Michigan.

Bitter cold air in the Midwest produced wind chills Monday morning as low as minus-48 degrees in North Dakota and minus-47 in northern Minnesota.

As this bitter cold made its way east overnight, it was expected to move over relatively mild Great Lakes, producing intense lake-effect snow bands capable of producing 2 to 4 inches of snow in an hour.

West Coast

\"PHOTO:
Steve Bloom/AP
PHOTO: Motorists drive near Yelm, Wash., Dec. 24, 2017.
>

Downtown Portland, Oregon, also had a white Christmas; its sixth since 1884.

We've still got snow and ice here at the office in NE Portland. Temperatures are struggling to get to freezing in NE Portland today. Expect road surfaces and sidewalks to re-freeze tonight as temperatures head into the mid 20s in most valley locations. pic.twitter.com/u8DCZpcZkM

— NWS Portland (@NWSPortland) December 25, 2017

And a storm system brought the first white Christmas to Seattle in nine years.

Yaaaaaaaasssssssssssssss! Let it snow! #snow #seattlesnow pic.twitter.com/asK7uWerxF

— Des ?? ?? (@askdes) December 25, 2017
\"PHOTO:
Steve Bloom/AP
PHOTO: A person walks near the Capitol campus in Olympia, Wash., Dec. 24,2017.
>

That storm system moved overnight through the Rockies, bringing more snow and the threat of avalanches.

The National Weather Service has issued an avalanche warning for the Wasatch Range mountains outside Salt Lake City

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