When Will the Polar Vortex Return?

After mild weather through this weekend, there are signs of another arctic blast on the way, including a glancing blow from the polar vortex.

While the timing of the the next polar plunge is challenging, it is not expected to be as extreme as that of Jan. 5-8, 2014.

"Following the retreat of arctic air this weekend, waves of progressively colder will move southward over Canada next week," AccuWeather.com Lead Long-Range Forecaster Paul Pastelok said.

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