It's like "bomb cyclone" or "firenado." It seems like the sort of phenomenon that would be responsible for the ...

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the ...

A mass of air called the polar vortex has escaped the Arctic and plunged southward. Some scientists see the fingerprints of ...

These severe cold events occur when the polar jet stream – the familiar jet stream of winter that runs along the boundary ...

A disruption in the polar vortex is about to send an Arctic air mass from Siberia as far south as Florida. Yes, Siberia—and ...

Anytime we get an Arctic air blast down this far south, this is an artifact of the polar vortex rearing its ugly head,” said ...

A lobe of the polar vortex will arrive in the United States this weekend, bringing the lowest temperatures in years and snow and ice to the East and Deep South.

As the Arctic rapidly warms, the temperature difference between the polar region and lower latitudes decreases, which weakens ...

A polar vortex that will bring in extremely and dangerously ... round of cold air looks moisture-starved. A stiff breeze will cause wind chill temperatures from 5 degrees below zero to 10 below.

which causes a powerful jet stream to emerge in the stratosphere and blow the cold air from west to east. This strong circulation is known as a polar vortex. This story was updated to fix a typo.