Polar vortex splitting brings uncertainty to Canada’s winter outlook
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The polar vortex usually strengthens during this period of the year. However, it has split early. This unexpected split creates uncertainty for the winter outlook in Canada. It may lead to an early flush of cold air reaching various parts of the country.
Typically at this time of year the polar vortex would be strengthening. But the early split could bring a flush of early-winter cold air to parts of Canada.