7am Update: Highway 17 north between Heyden and Wawa was shut down for a few hours overnight due to heavy snow. The highway has since re-opened. Environment Canada has lifted the Snow Squall watch for the area.
Bitter cold along with a possibility of snow squalls overnight and into Friday could leave the Sault with an additional 15cm by Friday.
Though there is also a chance of little activity for the city depending on wind direction as the squalls set up along Superior east and the north shore. Environment Canada has nonetheless issued a watch for the Sault and St. Joseph Island areas.
Snow squall watch in effect for:
Sault Ste. Marie – St. Joseph Island
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.
A few flurries are expected this evening however some more intense snow squall bands may develop overnight and move from north to south across the region. Visibilities near zero in snow or blowing snow and snowfall accumulations of 10 to 15 centimetres are possible by Friday morning.
Snow squalls cause weather conditions to vary considerably; changes from clear skies to heavy snow within just a few kilometres are common. Visibility may be significantly and suddenly reduced to near zero. Road closures are possible.