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

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

This dramatic-sounding phenomenon is a naturally occurring component of the Earth’s atmosphere that can play a huge role in ...

A significant change in the atmosphere means the weeks after Thanksgiving could be colder and snowier than normal across ...

A chilling forecast looms over the East Coast, with a polar vortex promising a hellish winter storm next week.

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

Some forecasters say a complex dance involving the polar vortex could send some of Earth's most extreme cold toward the ...

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.

A wide swath of the western U.S. may be in for below-average temperatures as forecasts suggest an Arctic blast is looming.

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

A rare stratospheric warming event high above the Arctic could disrupt the polar vortex and send colder air toward Texas in ...

A polar vortex is bringing colder air to parts of the U.S. But how much will Alabama be impacted as December begins? Here’s ...