As the National Weather Service explains, the polar vortex is an area of low pressure and cold air that exists over both of Earth’s poles 10 to 30 miles above the surface. The term vortex is used to ...

The polar vortex is a large area of cold, spinning air that sits near the North Pole and exists year-round. When it weakens or shifts, Arctic air can spill south, increasing the risk of snow and ...

Welcome to 'false spring,' New York! A polar vortex split could bring bitter cold back to NY, but how cold will it get and ...

Welcome to 'false spring,' New Jersey! A polar vortex split could bring bitter cold back to NJ, but how cold will it get and ...

Hang on to your coats and scarves: While the first part of this week brought a brief reprieve from the brutally cold weather the U.S. has been experiencing since January, frigid temperatures are about ...

The winter travel season in the U.S. is off to a bone-chilling start. Meteorologists are warning that a polar-vortex–driven blast of arctic air is poised to push unusually cold temperatures and ...

It’s that time of the year! An extensive and prolonged Arctic outbreak is on the way to impact much of the United States. From the Rockies through the Northeast and Southeast, temperatures will plunge ...

Around the same time as the heat starts blasting Phoenix, the polar vortex — a system that usually keeps frigid air penned up ...

A polar vortex split high in the stratosphere is expected to send frigid Arctic air toward Michigan and the Great Lakes. The event could bring colder-than-normal temperatures and late frosts to the ...

The sudden blast may have come as a shock to many Americans after a mostly mild start to winter, but that warmth may have partly contributed to the ferocity of the storm. As atmospheric and climate ...

WASHINGTON (7News) — Does this winter feel colder than most? It's possibly due to a weather phenomena called "cross-polar flow". Cross-polar flow is what happens when disruptions in the polar vortex ...