Blast of Arctic Air Will Bring Frigid Temperatures As Low As -35°C Plus Windchill to Southern Ontario Beginning Tomorrow Morning

The line of snow squalls that has been moving across the region this afternoon and evening is along the leading edge of a sharp cold front that will be followed by the coldest air that Southern Ontario has experienced so far this season. Temperatures will plummet behind this front as it continues to push southeast across the region as cold Arctic air floods in behind it. Temperatures will hit a minimum tomorrow morning, from 6am to noon, before rising a few degrees throughout the day.

One of the concerns with this extreme cold is that, although light (in the 10-20km/h range), the winds will make it feel even colder. Windchills could be as cold as -45°C across Central and Eastern Ontario, reducing frostbite times to a little as 10 minutes. This Arctic air is going to persist throughout the day tomorrow before warmer air from the south starts to move into the region on Saturday morning. With these cold temperatures, make sure to stay warm and keep your pets indoors!