As the U.S. prepares to take on another bout of cold weather, the term "polar vortex" is getting thrown around. But what is ...

Meteorologists warn that a stretched polar vortex could bring severe winter weather to much of the United States ...

A potentially major snow storm this weekend could give way to a blast of Arctic air for the second consecutive week. The next polar vortex impact is expected to follow a storm that could dump 6 inches ...

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

Temperatures could fall below -20 F across certain parts of North Dakota and Minnesota.

Extremely cold air is going to take over Michigan, as the center of the Polar Vortex drops far south. The center of this ...

The big winter (and popular) topic is dusted off very early this season as frigid air plunges south next weekend. But what is ...

Large swaths of the United States will get an arctic blast this week, leading to heavy snow, sleet, and freezing rain in ...

As a winter storm approaches Western North Carolina and other regions, here's what to know about deciphering forecaster terms ...

Alabama braces for another polar vortex blast bringing well below freezing temperatures. How cold will temperatures get? Here ...

When the polar vortex breaks, Artic air come south. Here's what to know right now.

"Bitter cold could linger through the end of the month," the Weather Prediction Center said in an update on Monday.