The severe weather pattern is caused by disruption of the polar vortex, which normally remains uniform over the North Pole.

As the U.S. prepares to take on another bout of cold weather, the term "polar vortex" is getting thrown around. But what is ...

Meteorologists warn that a stretched polar vortex could bring severe winter weather to much of the United States ...

Michigan is set for several days of frigid temperatures and heavy lake-effect snow as Arctic air continues its slow march ...

Christmas Day and Boxing Day had been and gone for another year. Families were at home or fast asleep when the quiet calm of twixmas brought a very rare and potentially deadly visitor to Tameside in ...