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Weekend Outlook: The polar vortex returns

Overnight lows will approach -30°C, and daytime highs will struggle to climb above -20°C
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Lobes of cold air associated with the Polar Vortex spinning around the Canadian Arctic continue to drop down across Ontario this month. As a result, we continue to see very cold outbreaks followed by brief warmer, more seasonal periods. The Polar Vortex will again send very cold air into the Sault area at the beginning of this weekend. Overnight lows will approach -30°C, and daytime highs will struggle to climb above -20°C.

The Polar Vortex pushes frigid air into the Sault region again on Friday under mostly sunny skies. Morning lows will be near -25°C, and afternoon temperatures will remain below -15°C. Even light northeast winds will be enough to bring windchill values near -30.

The cold snap continues into Saturday, with daytime highs near -15°C under mostly sunny skies.

A south wind arrives on Sunday to push cloud cover into the region along with light snow and warmer air. As a result, temperatures should climb to near -5°C by the late afternoon. A few centimeters of snow is likely by nightfall. Colder air returns again by the middle of next week.