A polar vortex is slated to sweep most of the continental United States bringing a hazardous freeze to millions of Americans from the Deep South to the Northeast Saturday going into next week.

Portland was forecasted to be about 6 degrees below normal Sunday and Monday, according to the National Weather Service.

A major winter blast of snow, ice, wind and plunging temperatures in the U.S. stirred dangerous travel conditions from central and southern states all the way to the East Coast early Monday, prompting schools and government offices in several states to close.

A lobe of the polar vortex will arrive in the United States this weekend, bringing the lowest temperatures in years and snow and ice to the East and Deep South.

About 63 million people in the U.S. were under some kind of winter weather advisory, watch or warning on Sunday.

The eastern two-thirds of the U.S. is dealing with bone-chilling cold temperatures and wind chills, forecasters said. Temperatures could be 12 to 25 degrees (7

snow and wind on Monday as the polar vortex that dipped south over the weekend kept an area stretching from the Rocky Mountains to the coast of Maine in its frigid grip, making many roads ...

Jan. 5—The eastern U.S. is on track for a frigid week as a polar vortex stretches south, bringing below-normal temperatures to Maine. Starting Monday, much of the eastern two-thirds of the ...

The polar vortex of ultra-cold air usually spins around the North Pole ... a weather service meteorologist based in Gray, Maine. The cold air was expected to grip the Eastern Seaboard as far south as Georgia, with temperatures dropping into the low ...

The polar vortex of ultra-cold air usually spins around ... a weather service meteorologist based in Gray, Maine. The cold air was expected to grip the Eastern Seaboard as far south as Georgia ...

The polar vortex of ultra-cold air usually spins around ... a weather service meteorologist based in Gray, Maine. The cold was expected to grip the Eastern Seaboard as far south as Georgia ...