The good news is, the extreme cold warning issued by Environment Canada has ended – though it still remains to be well below normal. The not so good news is the snow squall watch remains. Despite clear conditions in the Sault Wednesday morning, snow squalls could re-develop according to the nati0onal weather authority.
Snow squalls affected areas east of Lake Superior for much of the day yesterday. The passage of a strong cold front with northerly winds has shifted the activity into Michigan. However, as winds become northwesterly later today and then westerly tonight, the snow squall activity is expected to return. Some areas may see in excess of 15 cm of new snowfall.
There is considerable uncertainty regarding how long the snow squalls may affect the city of Sault Ste. Marie. It is possible that the snow squalls may shift through the city fairly quickly later this afternoon or evening which would limit amounts. However, if they remain over the city for several hours, significant accumulations may occur.
Areas north of the Sault including Batchawana Bay and Montreal River are likely to be affected later tonight and during the day on Thursday.
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 suddenly reduced at times in heavy snow.
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.