Sciencing on MSN
What it means when a polar vortex 'breaks'
The term "polar vortex" gained notoriety back in 2014 due to extreme winter weather, but there's more to this phenomenon than ...
The Weather Network on MSN
The polar vortex is on the move! Canada’s winter forecast update
Winter started quickly across most of Canada! Will a classic Canadian winter pattern hold through January and February?
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