The study published by Cohen and his co-authors suggested warming Arctic temperatures have been disrupting the polar vortex more often since 1990 and sending more frequent cold blasts into the U.S ...

A dangerous and potentially life-threatening stretch of cold weather has much of the U.S. on alert as a lobe of the polar vortex invades ... FOX Weather More than 30 states are now on alert ...

A weak vortex allows more arctic air and stormy patterns to develop here in the U.S. A strong one keeps arctic outbreaks at bay. Unfortunately, it is something that cannot be well predicted more ...