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

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

The culprit behind the country’s somewhat wacky weather, or at least part of it, is the (aforementioned) probable sudden ...

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

Once every two years there is a disruption of the polar vortex. So you get very strong warming like tens of degrees Celsius ...

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.

Winnipeg is particularly vulnerable when the polar vortex shifts. Its location on the open Prairies gives Arctic air an ...

NBC 5 Storm Team Meteorologist Kevin Jeanes took a look at what’s going on and what the weather may look like going into ...

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

The polar dance that caused snow to fall across the South in January has been studied for decades, but scientists still hope to answer many remaining questions. Miles above the Earth, two bands of ...