The bitter cold that overspread the central and eastern United States this past weekend will be relatively short-lived, forecasters said. "A large sector of the nation will continue to experience a ...

Polar vortices exist throughout the year at the poles. In the Northern Hemisphere, the polar vortex expands many times over ...

A Polar vortex has covered the Philadelphia region under a canopy of frigid temperatures, but many people may not realize what a Polar vortex actually is, and the dangers — like frostbite — such ...