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

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

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 ...

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 ...

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

It’s really, really cold again — as the US shivers through at least the eighth blast of air from the Arctic this winter. Winter, which is warming faster than any other season for much of the ...

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

Scientists say it’s being caused by a misbehaving polar vortex combining with a key weather pattern that seems to be stuck in place. Some scientists say these factors and this winter could be ...

This shift is due to yet another dip in the polar vortex, which is ushering in much colder air this week. But what exactly is the polar vortex? The polar vortex is a large area of cold air and low ...

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 ...