In the atmospheric layer above it, about 10 to 30 miles up, is the stratospheric polar vortex, where every winter a sunlight-starved Arctic spins up a mass of cold air that, ultimately, dissipates ...

Charlottesville and much of central Virginia were under an extreme heat warning Tuesday, with temperatures predicted to stay ...

The polar vortex is a circular flow in the stratosphere, which extends from the top of the troposphere to altitudes of about 30 miles. This circular flow forms every fall, and vanishes in spring.

A polar vortex collapse. Now, meteorologists are calling for another collapse in the middle of March, one that could plunge the U.S., Canada, and parts of Europe into a bitterly cold spell just ...

The polar vortex has taken on an unexpected pattern this winter - one that’s made part of the United States the most unusually cold place on the planet, at least so far this year.

Very cold weather is coming. US about to get 10th and chilliest polar vortex this winter Every state but Hawaii, California and Florida is likely to get a taste of wind chills of 20 degrees or colder.

Ben Noll, The Washington Post The polar vortex is coming back. After a half-month hiatus, frigid air will again surge across the United States beginning this weekend through next week, as the ...

The polar vortex is coming back. After a half-month hiatus, frigid air will again surge across the United States beginning this weekend through next week, as the unusually cold blob of air dips ...

The polar vortex is coming back. After a half-month hiatus, frigid air will again surge across the United States beginning this weekend through next week, as the unusually cold blob of air dips ...

It’s the polar vortex. Weather specialist Riley Laychuk breaks down what the polar vortex is and why it might not be as scary as it sounds.

Polar vortex is not a synonym for “cold snap,” according to the Polar Vortex Blog at Climate.gov, and it’s not the only weather pattern to blame for blasts of cold air.