Polar air is descending over Canada dropping temperatures nation-wide. The Weather Network's meteorologist Laura Power has ...

In 2014, the term “polar vortex” burst on the scene across Canada and the U.S. as temperatures plunged. In some places, it ...

A polar vortex — a large area of low pressure — is heading south from the Arctic, bringing with it cold weather across many ...

Multiple doses of Arctic air will bring significantly cold weather to much of Canada as we head into the start of ...

As winter approaches, the intriguing dance of La Niña and a disrupted polar vortex raises the tantalizing question: will ...

Winnipeg is particularly vulnerable when the polar vortex shifts. Its location on the open Prairies gives Arctic air an ...

Some forecasters say a complex dance involving the polar vortex could send some of Earth's most extreme cold toward the ...