Sunday snow in Montreal is a dusting compared to what's coming Tuesday

Montreal’s first real snowfall is expected to end Sunday night with a light accumulation of three centimetres — a mere dusting of snow — as temperatures drop to a chilly -13 C overnight.
Baby, it will be cold out there! And the landscape is to change as of Tuesday with more flurries, forecasts Environment Canada. 
Environment Canada issued a special weather alert for Châteauguay—La Prairie, Laval, Longueuil—Varennes and Montreal Island area expected to re