Michigan is set for several days of frigid temperatures and heavy lake-effect snow as Arctic air continues its slow march ...

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

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

In the coming weeks, cold air will continue for parts of the U.S. thanks to the influence of the polar vortex.

Research has found that rising temperatures in the Arctic are weakening weather systems that normally trap the cold around the poles, making winter weather more chaotic.

Arctic air originates near the polar regions and is among the coldest air masses on Earth. It typically stays locked in ...

Each of these lobes of the Polar Vortex will bring two or three days of bitterly cold, below-normal temperatures. We aren’t ...

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

In yet another sign that winter weather is either here or will be soon, the dreaded polar vortex is making news yet again. Its potential arrival in the United States over the next few weeks is cause ...

It has been a warm autumn so far. But the polar vortex is forecast to change unusually early, and that could impact your weather in December. Meteorologist Rob Shackelford breaks down why. Fantasy ...

The polar vortex is bringing bitter cold and snow to NJ this weekend. Here's the weather forecast, from timing to how much ...