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.

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 ...

Polar Vortex Makes Much of US Colder Than Greenland ... we’re sending them the warm air,” said Judah Cohen, seasonal forecast director at the private firm Atmospheric and Environmental ...