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

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

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 ...

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

When you buy through links on our articles, Future and its syndication partners may earn a commission. A satellite image showing a large area of low pressure, from the polar vortex, moving into the ...

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

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

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