Don't let the incoming string of relatively warm days in the greater Philadelphia region fool you; the polar vortex is still ...

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

When the polar vortex stumbles, the weather at ground level can pivot from mild to brutal in a matter of days. A circulation ...

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 ...

A strong polar vortex doesn't cause cold weather — it does the opposite. Here's what to know about polar vortices, how they work.

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

CLEVELAND — The temperature outside was so cold that your fingers, toes, nose and cheeks felt like they were burning. A harsh Arctic cold wave brought record-breaking temperatures to the United States ...

Winter is making its presence known in New York City, as the polar vortex is bringing brutally cold temperatures to the ...

If you couldn’t get enough of the cold temperatures in early December, there’s more on the way for Tennessee this coming ...

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