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.

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

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

What is the polar vortex? Mississippi weekend weather forecast calls for winter storm with lows in the teens, paired with ...

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

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

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 ...

Winter has settled in for the long haul, and the next few days only reinforce that feeling. Tonight brings mostly cloudy ...

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 ...

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

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