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

A shift in the polar vortex has forecasters watching closely as the coldest air of the season approaches. Here's what to know ...

What is the polar vortex? It’s a wintertime mainstay capable of flooding Canada with some of the world’s coldest air ...

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

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

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