Some of the coldest temperatures are expected in Montana, and avalanche warnings have been issued in Utah, Colorado and ...

The tenth and coldest polar vortex of the season is blasting across the US this week. More than 58million Americans are under ...

A National Weather Service map shows what is forecast to be the coldest polar vortex in the US this winter (Picture: National Weather Service) The tenth and coldest polar vortex of the season is ...

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

Meteorologists warn that the coldest burst of Arctic air this season is coming to put an icy and prolonged exclamation point ...

A polar vortex is expected to grip the Rockies and the northern Plains today as harsh weather moves west, bringing what the National Weather Service has warned is 'life-threatening cold' to the ...

he term “polar vortex” usually refers to the gigantic circular upper air weather pattern in the Arctic region, enveloping the North Pole The term “polar vortex” usually refers to the ...

The polar vortex is coming back. After a half-month hiatus, frigid air will again surge across the United States beginning this weekend through next week, as the unusually cold blob of air dips ...

The term "polar vortex" usually refers to the gigantic circular upper air weather pattern in the Arctic region. It is a normal pattern that is stronger in the winter and keeps some of the coldest ...