This cold blast could be relatively short-lived, with a return to more typical wintry temperatures by later in December.

A polar vortex is a large, low-pressure system of cold air that typically resides near the Earth’s poles, surrounded by ...

Winter hasn't even officially started, but parts of the country are already bracing for what could feel like the deep freeze ...

A polar vortex is a mass of cold air that normally stays contained over the Arctic. The cold blast is predicted to be ...

Arctic wind patterns create a sort of wall around the pole that prevents frigid air from trickling southward. That wall that ...

A polar vortex broke, and severe temperatures are set to dominate most of the United States, including the Midwest, in the ...

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

The polar vortex is responsible for the record cold wave that is hitting parts of the U.S.

It's a term you hear every couple of winters, when we get stuck in the coldest of cold patterns – polar vortex. But what exactly is it and how does it impact our weather? The polar vortex is like a ...

It's about to get very, very cold for lots of Americans. A series of blasts of polar vortex air from the north will bring subfreezing temperatures as well as ice and snowstorms to 40 US states, ...

Some sates saw subzero temps. Here's how cold it got in all states, and why it got so cold.

A major European research effort is beginning as Tampere University leads a €4.4 million Doctoral Network focused on high-power optical vortices, a form of twisting light with remarkable potential.