The polar vortex of ultra-cold air usually spins around the North Pole, but it sometimes plunges south into the U.S., Europe and Asia. Studies show that a fast-warming Arctic is partly to blame for ...
Forecasters are warning of another winter storm that could come on the heels of Winter Storm Blair, the remnants from which ...
Seven US states declared emergencies owing to the polar vortex of icy air that usually circles the North Pole.