So, this is why #Orillia has overachieved on snowfall amounts today. This is neat, though: The atmospheric instability is so extreme that it’s generating some minor lake-effect snow off of Lake Simcoe, which has a diameter of just 20 kilometres. #onstorm #ONwx

Helpful timelines for the incoming bout of snowfall for the GTA, Ottawa, Ont., and Montreal, Que. #onstorm #QCStorm #ONwx #MeteoQc

Oh, boy. It had to happen sooner or later. It is too early to have confidence in exactly where the bands will set up, and how much snow will fall, but some areas to the east and southeast of Lake Huron and Georgian Bay could see notable snow totals. Flurries are likely elsewhere. #ONwx

Lake-effect showers could develop overnight near Barrie, with brief, wet snowflakes possible in the Dundalk Highlands and snowbelt regions off Lake Huron and Georgian Bay. Accumulating snow is likely across the higher terrain in
Algonquin Provincial Park. #ONwx