While much of the eastern U.S. has been frozen by rounds of Arctic air and snow, the West has experienced weeks of unseasonable warmth, which has left many mountain ranges in a snow drought. A major ...

A cold front will bring plunging temperatures and snow to the Northeast this week. Polar vortex disruptions, caused by Sudden Stratospheric Warming, drive extreme cold southward. Officials advise ...

An unusually chilly spring is about to turn even more shocking as cold air, moisture and a visit from the polar vortex team up to trigger way out-of-season conditions for mid-May across portions of ...

The polar vortex's blast of Arctic air from Canada brought the season's coldest weather to the central U.S. The vortex is forecast to provide frigid weather with "a free ride," according to ...

With the polar vortex catching all the buzz in recent weeks, federal forecasters say our old friend La Niña is still a major force shaping winter weather for the United States. Federal scientists from ...

Face it — "polar vortex" is fun to say. It sounds like something that could have killed a red-shirted crewmember on the original "Star Trek" television series. Maybe that's why a weather feature that ...