As the National Weather Service explains, the polar vortex is an area of low pressure and cold air that exists over both of ...

The polar vortex is splitting — an exceedingly rare phenomenon for this time of year that will be an unusual driver of warmer ...

Those living in West Tennessee who want to experience cooler weather will have to wait a few more weeks.

WASHINGTON — Warm Arctic waters and cold continental land will combine to stretch the dreaded polar vortex in a way that will send much of the United States a devastating dose of winter weather later ...

There's a confounding dilemma for many folks trying to make sense of winter weather in the context of climate change.

Bitterly cold conditions can be a result of more than one thing, and in the case of January's deep freeze, the blame ...