Advisories from the NWS were in place for New York, Montana, California, Wyoming, Colorado and Alaska early on Friday.
As the West Coast braces for fiery winds and the Northeast shivers under a polar vortex, the nation finds itself caught between two extreme weather fronts.
The National Weather Service has simplified some of its winter weather alerts for Wind Chill and Extreme Cold Warnings.
Firefighters continue to fight fires in Los Angeles as strong winds returned to the region, spurring on a new fire near San Diego.
According to the National Weather Service, a polar vortex will impact most of the country this weekend, here is what you need ...