Meteorologist Sven Sundgaard predicted this wacky winter weather back in October, and he explains what's happening now and ...

After a brief lull that tempted some to declare the season finished, forecasters are warning that the atmosphere has other plans. A recharged polar vortex is poised to drive another round of bitter ...

A powerful winter storm, influenced by a polar vortex, is impacting much of the U.S., bringing heavy snow, ice, and extreme ...

The polar vortex is showing serious signs of weakening and could soon split or collapse spreading freezing weather southward ...

What is the Polar Vortex? The polar vortex is a large area of low pressure and cold air surrounding the Earth's poles. Normally, this cold air remains contained within the Arctic Circle, but ...

The possibility of snow in Tampa, Fla. Record heat and fires in Australia. Scientists say climate change is exacerbating ...

A crippling winter storm that could paralyze parts of the Southern and Central U.S. this weekend, and some of the effects ...

What travelers should know as a polar vortex heads towards the United States, including how airlines and hotels are responding, and experts on whether you should cancel your trip.

Michigan is experiencing frigid temperatures and heavy snow due to a dip in the jet stream, not the polar vortex. The polar vortex is a large-scale cyclone of cold air that typically stays far north ...

This winter, the Northern Hemisphere has been suffering from extreme cold. In South Korea, an unusually prolonged cold wave ...