The polar vortex is a mass of cold air swirling high above the Arctic. Scientists closely monitor atmospheric shifts that ...

As the National Weather Service explains, the polar vortex is an area of low pressure and cold air that exists over both of ...

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 ...

Polar Vortex collapse set to send temperatures plunging in the US and Canada - The weather event could unleash extreme winter ...

While temperatures are expected to rise in the coming days, polar vortex air is predicted to hit the United States again during the first week of March, bringing freezing temperatures to much of ...

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 ...

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

This diagram shows the general pattern and position of a stretched polar vortex that has brought the US multiple blasts of Arctic cold this winter.(CNN Weather via CNN Newsource) A few atmospheric ...

January and February have been colder than normal in Rochester this year One reason its so cold in Rochester is a distortion in the polar vortex Other factors include tropical fluctuations that ...

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 ...