That is the polar vortex. It’s not a snowstorm by itself. Instead, it’s a large area of low pressure and cold air that circles the North Pole. It exists all the time, but it usually gets stronger in winter.

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

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

Much of the country will be hit with extreme low temperatures over the next week as a polar vortex sends cold air down from the North Pole. Real feel temperatures throughout the northeast, including New England, could hit as low as single digits, according ...

The polar vortex is set to bring a winter storm to parts of Mississippi with ice, snow. But extreme cold will last for days. Here's what we know