The polar vortex is responsible for the record cold wave that is hitting parts of the U.S.

Most of Virginia is expected to receive 1-4 inches of snow on Monday, just three days after a similar snowfall covered all ...

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 ...

The first of three rounds of cold Arctic air from a shifting polar vortex has sent temperatures plunging across the central and eastern U.S., threatening centuries-old record lows in cities and towns ...

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

A polar vortex may be headed our way later this month. The phenomenon is a low-pressure buildup of cold air that swirls around the polar regions of the Earth. As it expands in the winter, it can send ...

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 expect in Tennessee.

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

Arctic air is taking cold to another level this week and the US could be facing bouts of it well into December thanks to the ...

Forecasters are tracking new polar vortex changes that could reshape early December across the U.S. How will this affect ...

SEDONA, Ariz. — The rock formation known as Kachina Woman rises like an obelisk out of a cool green canyon. At its base, more than three dozen women are tucked into crevices in the rust-colored stone, ...