This blast of cold weather is due to activity of the polar vortex.
It’ll be a memorable cold outbreak as gusty winds make the frigid air dangerously cold in many locations in the coming days ...
The vast majority of Americans are about to get an extended taste of frigid Siberian weather. Another polar vortex disruption ...
The mere mention of the term "polar ... circumpolar vortex is a counterclockwise-spinning (northern hemisphere) swirl of super-cold air in the upper atmosphere that sits atop the North Poles.