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

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

As another winter storm hits South Carolina and other regions, here's what to know about deciphering forecaster terms.

Winter Storm Fern aftermath continues as the East Coast braces for a bomb cyclone and polar vortex, with heavy snow and ...

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

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

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.

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

When to use emergency heat on thermostat? What is auxiliary or aux? Here's what to know about heat settings and best ...

The greater Philadelphia region will experience no weekend letup in the prolonged cold snap gripping the area.

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 ...