More than 122 million Americans are expected to travel at least 50 miles for Christmas and New Year's holidays this year.

The cold front follows a system that barreled across the Midwest and parts of the Great Lakes with sharply colder air, strong winds and a mix of snow, ice and rain, leading to treacherous travel. Forecasters said it intensified quickly enough to meet the criteria of a bomb cyclone, a system that strengthens rapidly as pressure drops.

Lake effect snow, intense rain and chilly temperatures dominate the forecasts for different parts of the U.S., before and after the new year arrives.

As for the rest of New Year’s Day and into Friday, Jan. 2, AccuWeather reports that “persistent lake-effect snow and another clipper storm will produce 12-24 inches of accumulation downwind of the Great Lakes, with locally higher amounts in upstate New York.”

An updated snow squall warning was issued by the National Weather Service on Thursday at 2:45 a.m. in effect until 3:30 a.m. for Lackawanna, Luzerne, Pike and Wayne counties.

Snow storms dumped snow on both ends of the country, but how much fell varied widely. Maps show snow totals across USA.

As the Northeast recovers from a heavy snowstorm, a new system is already moving through the Rockies and is expected to sweep across the country.

More than 9,000 domestic U.S. flights on Saturday were canceled or delayed as of early-evening, with many in the New York area.