A polar vortex is currently hitting the United States ... According to the Windy weather map, temperatures are currently ...

A map shared by Jeff Berardelli ... experience temperatures below minus 10 degrees next week as a lobe of the polar vortex ...

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 ...

A sudden stratospheric warming event reversed the winds that make up the northern polar vortex on March 9. A new animation shows the vortex also moved away from the Arctic towards Europe.