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

The polar vortex is a large area of low pressure and cold air surrounding both of the Earth’s poles. It ALWAYS exists near the poles, but weakens in summer and strengthens in winter. The term “vortex” refers to the counter-clockwise flow of air that helps keep the colder air near the Poles.

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

A polar vortex brings bitterly cold Arctic air into southern Ontario. Here’s what it is and what you can expect.

A polar vortex is expected to bring two surges of extremely cold air to the U.S. in January. Here's what to know in Middle Tennessee.

Here in the lower Great Lakes Region, we are well-equipped to handle blasts of cold and snow. It’s when the polar vortex sends arctic air into areas that don’t usually receive it that it can become dangerous. The polar vortex might be recently popular ...