Thanks to the polar vortex, the first half of December will bring multiple waves of Arctic air to the U.S. Here's what to ...

The first of three rounds of bitter air has arrived, threatening record lows in cities from the Midwest to the Northeast.

As one blast of Arctic air pushes out to sea, already a new surge of cold air, driven by a breakdown of the polar vortex, is ...

The Upper Midwest and Northern Plains have been hit by Canada's freezing temperatures. On Thursday, Dec. 4, wind chills ...

A polar vortex broke, and severe temperatures are set to dominate most of the United States, including the Midwest, in the ...

Three rounds of cold Arctic air from a shifting polar vortex are expected to plunge much of the central and eastern U.S. into ...

As one blast of Arctic air pushes out to sea, already a new surge of cold air, driven by a breakdown of the polar vortex, is ...

Frigid Arctic air is pushing south into the United States, and fortunately, it doesn’t look like freezing temperatures will ...

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

It is forecasted to be cold in the Bay State as a result of the breaking, or "displacement" of the polar vortex. According to ...

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

So is a polar vortex that weather watchers are forecasting for the central and eastern United States going to hit Florida ...