A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of the arctic blast.

The polar dance that caused snow to fall across the South in January has been studied for decades, but scientists still hope ...

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

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

How the Polar Vortex Can Bring Arctic Blasts to the U.S. Vast weather patterns can carry blasts of frigid air far from the polar regions—here’s how it works ...

Up next: another visit from the polar vortex. An Arctic air mass plunges into the Lower 48 next week. This brings the potential for multiple nights with subzero wind chills in the Ohio Valley.

If you thought last week was cold, hold onto your hot lattes and be ready to bundle up as ( another ) winter storm is forecast to plunge arctic air deep into the Deep South by early next week.

Most of the US will enjoy milder temperatures on Thursday, but the warmup will be brief as a polar vortex will ... escaping the icy grip of the arctic blast. More than 300 million Americans ...

According to National Weather Service forecasters, “the southern lobe of the Polar Vortex” will generate a much more significant, frigid cold Arctic Blast that will graze across Canada and the United ...