Noun
polar vortex (plural polar vortexes or polar vortices)
A large-scale cyclone located in the middle and upper troposphere and stratosphere that surround the polar highs and lie in the wake of the polar front.
Young people, those who think they're experts in science, there's no doubt. They just believe it, and so there has to be an explanation - and whatever man is doing has caused the jet stream to slow down, and that is permitting the polar vortex. Rush Limbaugh