Major cities across the Northeast and Midwest are facing temperatures 10-20 degrees below average, according to forecasters.

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

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 ...

Colder air is returning to the central and eastern U.S. as the polar vortex becomes more active, bringing fluctuating ...

A fierce Arctic blast of bitterly cold air is poised to overtake much of the central, eastern and southern U.S. over the next ...

Moreover, the latest data suggests that the Polar Vortex is on the verge of a significant disruption due to a new SSW event. The disruption is expected to lead to a colder pattern across the United ...

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

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

During winter, as the Arctic falls into 24-hour darkness, extreme cold builds over the Pole. This helps to create a ...

The brief respite of a January thaw is over as a significant pattern shift readies a return to harsh winter conditions across ...

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