A severe winter storm that brought freezing rain, sleet and snow to a large part of the U.S. was intensified by the polar ...

The sudden blast may come as a shock to many Americans after a mostly mild start to winter, but that warmth may be partly ...

Much below normal temperatures should persist across the eastern U.S. into early February before moderating slightly.

Meteorologist Sven Sundgaard predicted this wacky winter weather back in October, and he explains what's happening now and ...

The west half of the country, including the Midwest, will start to warm up. But that won't be the case for the East Coast.

A chilling polar vortex is set to bring snow and ice to the South and East this week. We show where.

The displacement of the polar vortex over the eastern half of the U.S. will usher in days of Arctic cold through the end of ...

Michigan is experiencing frigid temperatures and heavy snow due to a dip in the jet stream, not the polar vortex. The polar vortex is a large-scale cyclone of cold air that typically stays far north ...

After a brief stretch of milder weather, colder air is set to return to the Poconos as the polar vortex becomes active over the next 10 to 14 days, according to AccuWeather. Ben Gelber, a ...

OK. So the country will be laughing at us in July and August, wondering how we can live in the melting heat. But they’re not ...

Behind the historic winter storm that blasted 40 states this weekend, a dome of Arctic air associated with the polar vortex ...