A rare weather phenomenon that hasn't occurred since 1968 could soon impact the U.S., plummeting temperatures nationwide.

The phrase "polar vortex" has captured public attention and is now often misused to describe short-term bouts of frigid ...

The GFS ensemble is not as aggressive. Only a 20-30% probability for areas in blue and 30-40% for areas in green. So what’s ...

A "shocking" Arctic blast – with temperatures more akin to mid-January than early November – is poised to overspread the eastern half of the U.S. starting around Nov. 8, sending tens of millions into ...