A chilling polar vortex is set to bring snow and ice to the South and East this week. We show where.

A dramatic blast of cold air may be coming for the United States in late January, courtesy of the polar vortex. Here's what ...

The displaced polar vortex will bring prolonged periods of cold to the eastern portion of the Lower 48 through the end of ...

An unusually brutal winter storm is set to pummel more than 160 million Americans from Friday, as a stretched "polar vortex" ...

What is the polar vortex? Mississippi weekend weather forecast calls for winter storm with lows in the teens, paired with ...

Don't let the incoming string of relatively warm days in the greater Philadelphia region fool you; the polar vortex is still around.

A crippling winter storm that could paralyze parts of the Southern and Central U.S. this weekend, and some of the effects ...

A significant portion of the U.S. is experiencing below-average temperatures due to a disrupted polar vortex, affecting over ...

Ben Gelber, a meteorologist for NBC4 in Columbus, Ohio, and a Pocono native, said the polar vortex is a large, circular pool ...

No weather records are expected to be broken. The coldest Jan. 24 on record was -32.2 C in 1882, according to historical data ...

If you've ever wondered why winter sometimes flips from mild to brutally cold, the answer might be hiding 20 miles above your head. That's where a rare atmospheric phenomenon called sudden ...

CLEVELAND — The temperature outside was so cold that your fingers, toes, nose and cheeks felt like they were burning. A harsh Arctic cold wave brought record-breaking temperatures to the United States ...