There's a "polar vortex" sweeping across America, and it is NASTY

A spiraling pool of cold, dense, arctic air called a "polar vortex" began its frigid sweep of the U.S. today. "It's just a dangerous cold," said National Weather Service meteorologist Butch Dye this morning. The arctic chill is expected to burden some regions of the country with the coldest weather they've seen in close to … » 1/05/14 9:00am 1/05/14 9:00am