An arctic blast swept through the northern Plains and the Midwest over the weekend, causing hazardous travel conditions near the Great Lakes.

Travel conditions across the country are beginning to improve after winter weather and rain prompted thousands of flight delays following the Thanksgiving holiday. Disruptions were felt from Newark to Seattle,

Millions of drivers and air travelers may face severe weather and long lines over the next few days. More than 50,000 flights are expected to take off on Tuesday, one of the busiest travel days.

Parts of New York, Vermont, New Hampshire and Maine are under winter storm warnings, and precipitation is expected to begin as early as 1 a.m. on Thanksgiving Day. Higher elevations, including area ski resorts, will see snowfall that could continue through 1 a.m. on Black Friday.

An arctic blast of severe cold and snow is creating hazardous conditions across the Great Lakes region over the next two days, according to the US Weather Prediction Center, potentially disrupting the plans of millions traveling the roads and skies.

An Arctic blast brought snow, frost and dangerously cold winds to the northern Plains, the Midwest and the Great Lakes, creating “very difficult to impossible” travel conditions on one of the busiest days of the year,

An Arctic blast brought snow, frost and dangerously cold winds to the northern Plains, Midwest and Great Lakes, creating difficult travel conditions on one of the busiest travel days of the year, as millions of Americans head home from their Thanksgiving destinations.