Northern Ontario: Fall Weather Hazards Outlook for Thursday, November 18, 2021

Forecast Discussion

Snow squalls are possible off the Eastern shoreline of Lake Superior starting early Thursday morning and continuing throughout the day. The heaviest snowfall rates will be found between Sault Ste. Marie and Wawa where travel conditions will be quite poor during the morning and afternoon with near-zero visibility. We expect to see the squalls will slowly weaken by late Thursday and be fully done around the midnight hour.

Total accumulation in the hardest hit zone including Wawa and just to the north of Sault Ste Marie could approach up to 20cm with general amounts between 10-20cm. Surrounding areas that include Marathon, Chapleau and Sault Ste. Marie can expect locally up to 5-10cm by the end of the day although not everyone will see even a flake of snow due to the localized nature of lake effect snow.