A lobe of the polar vortex, a ring of freezing air typically found near the North Pole, will once again move into the central ...

The heaviest accumulations, possibly a foot (30.5 centimeters) or more, were expected in upstate New York and portions of ...

The latest blast of frigid air will linger across the central and eastern U.S. through much of the week while another winter ...

Harsh weather moved west as a polar vortex was expected to grip the Rockies and the northern Plains after winter storms ...

More than 95 million people are facing gripping cold Tuesday as a polar vortex sends temperatures plunging to record levels, ...

But at times some of the vortex can break off or move south, bringing unusually cold weather south and permitting warmer weather to creep up north.

Meteorologists warn that the coldest burst of Arctic air this season is coming to put an icy and prolonged exclamation point ...

A powerful polar vortex is set to bring dangerously cold temperatures to the US, with the Northern and Central Plains facing ...

This week, parts of the U.S. including North Dakota are experiencing the 10th and coldest polar vortex event this season.

A cold weather advisory is in effect until noon Tuesday, with wind chills ranging between minus 15 and minus 25 before ...

ushering in a frigid polar vortex that will leave parts of the US suffering through wind chills as cold as -50 degrees. A powerful winter storm is set to plow through the southeast and Central ...

After a winter storm brings snow, ice to several states, Mississippi will see Arctic air from the polar vortex for a few days. Be ready for deep cold.