It’s really, really cold again – as the US shivers through at least the eighth blast of air from the Arctic this winter. Here ...

The term “polar vortex” usually refers to the gigantic circular upper air weather pattern in the Arctic region. It is a ...

Every U.S. state but Hawaii, California and Florida have some or ... Obviously this isn’t the first polar vortex episode of the winter, but it looks to be the most severe.” ...

Scientists say it’s being caused by a misbehaving polar vortex combining with a key weather ... a research scientist with the University of California, Berkeley, said, noting that when we ...

The polar vortex has taken on an unexpected pattern this winter — one that’s made part of the United States the most unusually cold place on the planet, at least so far this year. While the ...