This cold blast could be relatively short-lived, with a return to more typical wintry temperatures by later in December.

The Polar vortex is causing temperatures to plummet dangerously across the Philadelphia region, and frostbite could become a ...

As we head into the polar vortex, meteorologists are calling for up to a foot of snow in some parts of the U.S.

Winter hasn't even officially started, but parts of the country are already bracing for what could feel like the deep freeze ...

Year-round, severe, artic air is usually kept tightly contained in the North Pole. Arctic wind patterns create a sort of wall ...

Arctic wind patterns create a sort of wall around the pole that prevents frigid air from trickling southward. That wall that ...

The phrase "polar vortex" has captured public attention and is now often misused to describe short-term bouts of frigid weather.

Another Arctic blast is on the move toward the U.S., bringing the potential for bitter cold and heavy snow accumulations to ...

The polar vortex can commonly be disrupted during the winter and is known to cause an Arctic outbreak in the United States.

La Niña has a major influence on winter weather in the U.S., but its effects vary drastically by region. What will we see?

Winter arrived early in Michigan — and it arrived forcefully with lake-effect snow and even blizzard conditions. What's expected for Christmas?