As we look toward mid-December into January, the door is opening for some potentially significant winter weather.

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

The polar vortex could be disturbed in a way that hasn't happened this early in 25 years. You’d be forgiven for being ...

Forecasters say a polar vortex could push Arctic air into Western and Central Canada as early as next week, with the cold ...

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

December might be extra chilly this year across parts of the United States this year because of a weather phenomenon ...

Another Arctic blast is on the move toward the U.S., bringing the potential for bitter cold and heavy snow accumulations to Michigan.

As winter approaches, Winnipeg braces itself for the impending chill associated with a polar vortex shift. Meteorologists have issued warnings about a significant blast of Arctic air set to sweep ...

The polar vortex can be likened to a powerful wall of wind that contains ultra-cold Arctic air over the North Pole. When this vortex weakens, it allows cold air to spill southward into regions such as ...

A storm system will move through Oklahoma Tuesday into Tuesday night, Nov. 26, bringing rain across the region.

There’s something happening in the stratosphere right now that could potentially lead to more snow and colder temperatures in ...

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