A weakened jet stream within the polar vortex allows frigid air from the Artic to move further south than usual. Presley Bo Tyler is a reporter for the Louisiana Deep South Connect Team.

The cause of the week-long deep freeze? 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 ...

It is not, however, the second coming of a polar vortex, a phrase the National Weather Service's Chicago office tweeted earlier this week to describe the upcoming sweater weather. They quickly ...