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

Here’s the wind chill chart. Notice the four shadings, indicating how long it will take for frostbite. When we get to wind ...

After this weekend's snow storm moves out, cold Arctic air will move in.

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

The polar vortex will engulf much of North America as we head into next week, with temperatures dipping down into the -20s and -30s in some Canadian provinces. Even states like the Carolinas, Georgia, ...

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

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 ...