A fascinating, atmospheric pattern causing a continent-wide temperature swap is resulting in parts of Canada to experience ...

A fresh blast of Arctic air is poised to spill across a wide swath of the United States, and the latest polar vortex map ...

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

The storm door stays closed for now, as forecast models show California staying warm and dry for a considerable amount of ...

Major cities across the Northeast and Midwest are facing temperatures 10-20 degrees below average, according to forecasters.

The polar vortex is expected to send Triad temperatures plunging into the mid-teens by Thursday night. Another cold snap is ...

We’re in the middle of a pretty active stretch of winter weather patterns, even if it doesn’t look that exciting outside ...

We have launched a First Alert Weather Day for both Thursday and Friday in anticipation of strong winds and very low humidity ...

We’re in the middle of a pretty active stretch of winter weather patterns, even if it doesn’t look that exciting outside ...

Arctic air originates near the polar regions and is among the coldest air masses on Earth. It typically stays locked in higher latitudes, but large-scale shifts in the jet stream can allow it to ...

One system will likely track just south of New England, bringing a few scattered showers to Boston and southeastern Mass.