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

Much of the nation east of the Rocky Mountains is hunkered down for what could be the worst winter storm of the season.

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.

The polar vortex will keep the freezer door wide open during much of Feburary, which will not only keep energy demands and the cost of heating homes and businesses high, but more winter storms will ...

The polar vortex is an extensive area of low pressure and cold air surrounding both the Earth's poles, weakening in summer ...

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

To understand what Americans are experiencing with this winter blast, we need to look more than 20 miles above the surface of ...

A collapse in the polar vortex is letting Artic air come here. What that means, and why it happens.

Deep penetration of cold temperatures and a coastal storm will bring bomb cyclone and polar vortex into your newsfeeds.

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

The throughline is unpredictability at The Foundry this Valentine's Day season, as slink g moss's "Valentine Vortex" Feb. 7 and the "Anti-Valentine's Show" Feb. 13 with Cady Huffman and Mary ...

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