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 ...

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 ...