A big snow event is shaping up in the form of lake effect snow squalls for most of the Great Lakes into the weekend.
A return to much colder air over the relatively warmer waters of the Great Lakes could produce up to a 40cm in some snowbelt areas by Saturday.
Environment Canada has issued a watch for the area as of right now.
Snow squall watch in effect for:
Sault Ste. Marie – St. Joseph Island
Searchmont – Montreal River Harbour – Batchawana Bay
Snow squalls are expected to develop. Under the snow squall bands, visibilities will be significantly reduced due to the heavy snow combined with blowing snow, and snow will quickly accumulate.
Snow squalls are expected to develop tonight.
Lake effect flurries will become heavier this evening and snow squalls are possible through Friday morning.
Snow squalls cause weather conditions to vary considerably; changes from clear skies to heavy snow within just a few kilometres are common. Travel may be hazardous due to sudden changes in the weather. Visibility may be suddenly reduced at times in heavy snow. Public Safety Canada encourages everyone to make an emergency plan and get an emergency kit with drinking water, food, medicine, a first-aid kit and a flashlight.
Snow squall watches are issued when conditions are favourable for the formation of bands of snow that could produce intense accumulating snow or near zero visibilities.