Snow forecast for Southern Ontario on Wednesday with up to 20cm; Snowbelt region could see 50cm

Snow forecast for Southern Ontario on Wednesday with up to 20cm; Snowbelt region could see 50cm

Southern Ontario’s snowy landscape is quickly changing as a multi-day snowstorm blanketed parts of the snowbelt region with over 100 cm of snow.

Southern Ontario will soon get its turn as a weather system moves into the region on Wednesday, resulting in largely light accumulations around Lake Huron and Georgian Bay.

Snowfall from this system will likely combine with lake enhancement and embedded snow squalls, resulting in higher accumulations in snowbelt areas still digging out from last weekend’s snowstorms.

Some snowbelt regions should see 30-50 cm more snow by Thursday morning. Southern Ontario is expected to receive five to fifteen centimeters of snow throughout the week, including parts of the Greater Toronto Area (GTA), which has received minimal snowfall.

Alberta clipper driving this system pushed into Northwestern Ontario on Tuesday afternoon from Manitoba. Throughout Northern Ontario, we expect moderate to heavy snowfall accumulations through the evening and overnight.

The highest totals are expected east of Lake Superior, between Wawa and Sault Ste. Mary. Depending on the snow squall that formed off Lake Superior, 30 to 50cm of snow may fall.

Sudbury may experience around 20 cm of snowfall accumulation around the Georgian Bay shoreline. Lake Nipigon south of Thunder Bay to Geardton may also experience some lake enhancement due to this phenomenon.

Northeastern Ontario can expect 10 to 15 centimeters with local accumulations reaching 20 centimeters. Northwestern Ontario, including Thunder Bay, will receive less than 10 cm of snow.

On Tuesday afternoon, Lake Superior experienced lake-effect snow ahead of the system. The Bruce Peninsula and areas northeast of Georgian Bay, such as Parry Sound, Britt, and North Bay, are expected to be the most affected by snow squalls by Tuesday evening.

Snow squalls are expected to continue into Wednesday morning.

The southern Niagara region and Prince Edward County may see additional lake effect snow Wednesday morning off Lake Erie and Lake Ontario.

Although these squalls may reduce visibility and cause heavy snowfall locally, they will not remain stationary for long, so they aren’t expected to accumulate much snow.

Most of Central and Eastern Ontario will receive between 10-15 cm of snow, with the Ottawa Valley having an accumulation of less than 5 cm.

There is a possibility that some areas along the northern shorelines of Lake Ontario and Prince Edward County may experience 20cm of flooding.

Snowfall amounts may reach 10-15 cm in areas like Kitchener, Woodstock, Guelph, and Barrie. Lake enhancement may cause some areas to see lower amounts due to variability, however.

Niagara is expected to receive 5-10 cm, with heavier snow bands influenced by Lake Erie accumulating in the GTA.

Snowfall amounts in Deep Southwest Ontario will decrease westward, with London receiving a total of 10 cm. Under 5 cm is anticipated further southwest, including Sarnia, Windsor, and Chatham.

Snow squalls are expected, starting Thursday morning, to impact areas southeast of Lake Huron and Georgian Bay.

In affected areas, additional accumulations of 30-50 cm could be expected as high-resolution models refine their squall locations. Look forward to a detailed forecast soon.

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