Alberta Clipper Brings More Snow to Parts of Southern Ontario Tonight Into Wednesday With Up to 12-20cm of Snow Possible

It has been quite the start to the week across Southern Ontario as an intense snowstorm brought blizzard-like conditions and up to 60cm of snow early Monday. The cleanup is still ongoing for those that received the most snow including the GTA and Eastern Ontario. And as the dig out continues, more snow is expected late Tuesday into Wednesday courtesy of an Alberta Clipper sweeping across the northern part of Southern Ontario. Fortunately, the heaviest snow should be predominantly focused on locations that got off lightly from Monday’s major snowstorm. Parts of Northeastern and Central Ontario could be looking at between 10-20cm of snow from this clipper by the time it tapers off late Wednesday.

We’re already seeing the first bands of precipitation move into our region from the west bringing light to moderate snowfall around the eastern shoreline of Lake Huron. This is expected to spread eastward later tonight and linger into Wednesday. The heaviest snow will occur just after the midnight hour during the early morning hours on Wednesday with it becoming less intense later on in the morning. We have a particular focus on regions east of Georgian Bay including Muskoka, Algonquin Park and northwards into Sudbury and North Bay where the heaviest snow will be found. Some lake enhancement could also boost those totals around Georgian Bay.

The snow is expected to move out of Southern Ontario by the late afternoon on Wednesday, but there are indications that lake effect snow may develop off Georgian Bay in the wake of the system. Expect localized snow squall activity for the Parry Sound-Muskoka region during the early evening with the bands drifting southwards into Grey-Bruce and Simcoe County by the late evening. Some minor lake effect snow may linger into Thursday morning southeast of Georgian Bay and Lake Huron although it’s looking fairly unorganized at this point.

Snowfall totals east of Georgian Bay and into Northeastern Ontario from this system along with the lake effect snow that follows it should range from 12-20cm with localized pockets of 25cm. Further east, we’re looking at around 6-12cm for the Ottawa Valley. Those in Grey-Bruce counties and around Lake Simcoe can also expect 6-12cm of snowfall accumulation on Wednesday. However, this is mostly based on the expected lake effect snow later in the day so some areas may receive less than that.

Snowfall totals will decrease as you go further to the south with some rain and freezing drizzle to mix in. The freezing drizzle doesn’t appear to be a widespread issue so we won’t be including a freezing rain map but be aware of some icy road conditions through Southwestern Ontario and around the Golden Horseshoe.