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

When parts of the vortex break down, lobes of Arctic air can drift south, guided by changes in the jet stream. This allows ...

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

Three separate rounds of Arctic air have already swept across the central and eastern United States through mid-December, ...

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

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 ...

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

Capt. Mike Cacciotti fished with a couple and their dog out of Baytown. The trout bite was slow, but, nevertheless, their effort didn't go to waste. They brought home some ...

A long-awaited blast of cold air, courtesy of the polar vortex, will overtake much of the US, but the forecast says the low ...

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