Early-season stratospheric warming events spark hype around frigid temperatures. Learn the myths and the science about the ...

For folks who long for cold, the weeks after Thanksgiving might just be a tease for some intense Arctic cold that could ...

In 2014, the term “polar vortex” burst on the scene across Canada and the U.S. as temperatures plunged. In some places, it ...

The phrase "polar vortex" has captured public attention and is now often misused to describe short-term bouts of frigid ...

It's been a warm autumn, so far. But the polar vortex is forecast to change unusually early, and that could impact your ...

Sometimes, the polar vortex simply stretches out, bringing quick bursts of cold air and some wintry weather to the U.S. In ...

A rare stratospheric event is forecast to unleash bone-chilling air from a weakening vortex across the US and New England, ...

Thanksgiving is forecast to be colder and snowier than usual across large swathes of the U.S., threatening to snarl what the ...

An unusually strong disruption in the upper atmosphere is setting the stage for a winter pattern that could lock much of the ...

But across the country, AccuWeather meteorologists are predicting major travel disruptions as a storm system is set to batter ...

The polar vortex is weakening, which means New England is in for a colder than usual December, with episodic cold snaps.

Over the next 10 days, scientists say, changes in the stratosphere will upend weather patterns and set the stage for a cold, snowy December across parts of the Northern Hemisphere.