The polar vortex is essentially a large area of low pressure and cold air surrounding both of Earth’s poles. It constantly sits over the poles but expands in the winter.

The polar vortex is aways around - it just normally stays near the North Pole. But when it descends into our area, get ready for really cold weather.

The polar vortex is a massive area of cold air located high in the atmosphere, typically spinning over the north pole. Imagine it as a giant, icy whirlpool far above the Earth, keeping frigid ...

A huge swath of the U.S. was blasted with ice, snow and wind on Monday as the polar vortex that dipped south over the weekend kept much of the country east of the Rockies in its frigid grip, making… ...

A rare split polar Vortex will plunge millions of Americans into freezing temperatures as it's set to blast powerful cold air across the country around Valentine's Day. Forecasters have warned of ...

ANNAPOLIS, Md. — A huge swath of the U.S. was blasted with ice, snow and wind on Monday as the polar vortex that dipped south over the weekend kept much of the country east of the Rockies in its ...

The polar vortex is a massive area of cold air located high in the atmosphere, typically spinning over the north pole. Imagine it as a giant, icy whirlpool far above the Earth, keeping frigid ...

ANNAPOLIS, Md. -- The United States continued to freeze through a polar vortex that brought rare cold to the southern United States and chances of freezing weather through much of the country.

Most of the U.S. will enjoy milder temperatures on Thursday, but the warmup will be brief as a polar vortex will send temperatures tumbling below freezing for most of the nation starting this weekend.

In Kentucky’s biggest city, Louisville, Hugh Ross used his shovel Monday to break sheets of ice that were covering his driveway. Frozen rain fell atop snow that arrived Sunday, which he said ...