Three polar vortex systems are anticipated in December, and the first is expected this week, according to AccuWeather. The ...

A polar vortex is a mass of cold air that normally stays contained over the Arctic. The cold blast is predicted to be ...

A powerful winter storm is charging through the Northeast, where millions are expected to see first 'measurable' snow of ...

The planet's most extreme cold air will be barreling into the central and eastern United States this coming weekend "like a ...

A large portion of the United States is facing atypically cold temperatures in the coming days, Kentucky's WKDQ reported, due ...

A polar vortex from the North Pole has shifted south over Canada, and will be pushing chilly sub-zero temperatures down into ...

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

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 ...

High above the North Pole, about 10 to 30 miles above Earth’s surface, sits a massive whirlpool of icy air known as the polar ...

Some of the coldest temperatures are expected in Montana, and avalanche warnings have been issued in Utah, Colorado and Washington.

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 ...

Cold temperatures are set to continue into the weekend, but New England will feel another icy blast of Arctic air Sunday ...