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 easy answer is a deep southward dip in the polar jet stream that typically rings the globe at higher latitudes but is ...

The polar vortex's icy grip on much of America has Arctic Greenland seeming like a toasty vacation spot by comparison.

Polar vortex is not a synonym for “cold snap ... weather milder over the Eastern U.S. and Northern Europe, said Judah Cohen, director of seasonal forecasts at Atmospheric and Environmental ...

WASHINGTON (AP) — The polar vortex hit its peak across much of ... we’re sending them the warm air,” said Judah Cohen, seasonal forecast director at the private firm Atmospheric and ...

This will be the 10th time this winter that the polar vortex — which keeps the coldest ... to send some of that big chill south, said Judah Cohen, seasonal forecast director at the private ...