A mass of air called the polar vortex has escaped the Arctic and plunged southward. Some scientists see the fingerprints of ...

Research has found that rising temperatures in the Arctic are weakening weather systems that normally trap the cold around ...

The vortex is essentially an area of low pressure in the upper layers of the atmosphere over the polar region up north. This ...

How the Polar Vortex Can Bring Arctic Blasts to the U.S. Vast weather patterns can carry blasts of frigid air far from the ...

It's like "bomb cyclone" or "firenado." It seems like the sort of phenomenon that would be responsible for the record-breaking blast of cold, snow and wintry conditions that reached all the way to the ...

A lobe of the polar vortex, a stormy ring that typically keeps the coldest air locked up near the North Pole, will dip southward ... before rapidly moving south and east and encompassing much ...

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the South.

With last week's freeze being the second time temperatures dipped below freezing this winter, many are wondering if this ...

Recent forecasts suggest some Americans might be getting a much-needed break from the freezing temperatures that have gripped much of the country.

The polar vortex is like a giant, swirling pool of super-cold air in the upper atmosphere over the North Pole. Imagine it like ... air can spill out and slide south, making places like the United ...

The University of Wisconsin-Madison faced a frigid start to the semester, with the polar vortex expected to bring more icy ...

Research has found that rising temperatures in the Arctic are weakening weather systems that normally trap the cold around ...