The first cold wave will reach the East Coast on Thursday, followed by another surge of frigid air this weekend and more next ...

With over 170 million Americans facing below average temperatures, even colder air may be on the horizon thanks to the ...

Each of these lobes of the Polar Vortex will bring two or three days of bitterly cold, below-normal temperatures. We aren’t ...

Arctic air originates near the polar regions and is among the coldest air masses on Earth. It typically stays locked in ...

Don't let the incoming string of relatively warm days in the greater Philadelphia region fool you; the polar vortex is still ...

The Arctic Oscillation is a metric used to describe the strength of the polar vortex, or mass of arctic air that rotates ...

From hundreds of miles above Earth, the brutal polar vortex that gripped the Great Lakes turned into something strangely ...

The Polar vortex is causing temperatures to plummet dangerously across the Philadelphia region, and frostbite could become a ...