In yet another sign that winter weather is either here or will be soon, the dreaded polar vortex is making news yet again. Its potential arrival in the United States over the next few weeks is cause ...

A polar vortex is on its way for much of Canada next week. And while it’s not the first time Canadians have faced down the chill of a polar vortex in recent years, this one is set to cause ...

Meteorologists don't have the specific forecast ready yet, but there is a growing consensus that December will be a frigid one for parts of the United States. The National Weather Service's Climate ...

The polar vortex is weakening, which means New England is in for a colder than usual December, with episodic cold snaps. Every year around this time, that phrase — “polar vortex” — starts to buzz ...

If you’ve ever wondered why winter sometimes flips from mild to brutally cold, the answer might be hiding 20 miles above your head. That’s where a rare atmospheric phenomenon called sudden ...

Arctic air is expected to bring “near record cold” along with “dangerous wind chills” as it tracks south from the Northern High Plains on Friday, spreading into the Central Plains and Ohio Valley on ...

Just a few days into December, an arctic air mass has swept into the United States, bringing subzero morning lows and daytime highs stuck in the teens for 30 million Americans in the Northern Plains, ...

Scientists are still trying to understand the atmospheric disturbances. A significant change in the atmosphere means the weeks after Thanksgiving could be colder and snowier than normal across ...

(NEXSTAR) – A good chunk of the country could be in for cooler-than-average temperatures this Thanksgiving and beyond. The most recent outlooks from the National Weather Service’s Climate Prediction ...

The polar vortex is so back, and in some parts of the country, the weather system will bring with it up to a foot of snow. If “polar vortex” is giving you déjà vu, that’s because we’ve heard it before ...

High above the North Pole, in a largely overlooked part of the atmosphere, a major shift is taking shape. Over the next 10 days, developments in the stratosphere are expected to reshape global weather ...