Much of the nation east of the Rocky Mountains is hunkered down for what could be the worst winter storm of the season.

As the U.S. prepares to take on another bout of cold weather, the term "polar vortex" is getting thrown around. But what is ...

Cold temperatures are expected to last through the end of the month — and forecasters say that there's a potential for snow ...

After this weekend's snow storm moves out, cold Arctic air will move in.

A crippling winter storm that could paralyze parts of the Southern and Central U.S. this weekend, and some of the effects ...

What is the polar vortex? This article explains what a polar vortex is in simple terms, how it influences winter weather in ...

The North Pole is surrounded by a massive circular upper-air weather phenomenon in the Arctic called the polar vortex. It is ...

Rising Arctic temperatures and melting sea ice could be causing cold air to flow into the Northern Hemisphere. But not all ...

The displaced polar vortex will bring prolonged periods of cold to the eastern portion of the Lower 48 through the end of ...

Major cities across the Northeast and Midwest are facing temperatures 10-20 degrees below average, according to forecasters.

This coming weekend, the central and eastern United States will receive a blast of Arctic air, which will also affect Tennessee's weather.

A winter storm descending on the US is expected to deliver heavy snow and ice to more than 150 million people across roughly ...