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

Meteorologists had predicted that parts of the U.S. would experience the 10th and coldest polar vortex event this season.

A few atmospheric factors — including the polar vortex — have come together to make the US the epicenter of cold this winter. One is a weather pattern around the Arctic Circle that has emerged ...

A split of the polar vortex usually means a high-pressure area will split over the polar circle. The daughter vortices will bring "a large supply of cold air" with them. As one is set to move over ...

Polar night skiing provides a unique adventure for skiers looking to carve trails under the Arctic Circle's starlit skies.