Polar Vortex, Arctic Blast

A Siberian chill is on the horizon, threatening to plunge the U.S. into a deep freeze in parts of the east coast ...
A recent study explains how warmer temperatures at the top of the planet destabilize the jet stream and allow colder air to ...
Some experts say the Frigid air that normally stays trapped in the Arctic escaping is happening more frequently because of a ...
Another polar vortex disruption will stretch Arctic air ... 15 years," said winter weather expert Judah Cohen of Atmospheric Environmental Research. "It's pulling air out of Siberia.