'Polar vortex' descends into US, bringing sub-zero temperatures

The so-called polar vortex, as some meteorologists are describing this weather pattern, will also bring the coldest temperatures in years as far south as Atlanta and Nashville, where the high on Monday is expected to be 10 degrees. Check out these 5am

First comes more snow to Michigan, then the freeze. Well, a deeper freeze.

Temperatures across the United States were expected to plunge to their lowest levels for 20 years, as almost half of the population were trapped under what is known as a "polar vortex". The wind chill from the rare climatic phenomena could make it feel

The American Midwest and Northeast have braced for a "polar vortex," a megastorm that is expected to bring record low temperatures on Monday.

A so-called "polar vortex" of dense, frigid air descended upon much of the U.S. Monday, dropping temperatures in some parts of the country to near-record lows and prompting wind chill warnings from Montana to Alabama. The Midwest is being hit with the