Multiple clippers and lake-effect snow to add to Ontario's totals this week
Frigid start to the week in southern Ontario, with multiple rounds of snow expected to follow
December is off to a wintry start across Ontario, and this week will be no different, with frigid temperatures and rounds of snow hitting the province ahead of the official start to the season. Some areas could pick up 5-15+ cm this week.
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Be sure to monitor the forecast for updates regarding snowfall amounts and impacts, as well as any alerts as conditions change or deteriorate.
Midwinter-like chill and rounds of snow to start the week in Ontario
The week began with a midwinter-like chill, bringing the coldest daytime highs in over nine months to places like Toronto and Ottawa. Temperatures will be well below seasonal for most areas.
By Tuesday, a clipper system from the Prairies will deliver widespread snowfall across northern, central, and southern Ontario. Regions east of Lake Superior could see 5-10 cm of snow, while 2-5 cm is expected across southern Ontario.
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Overnight, heavier snow will arrive as a second clipper moves in, with significant snowfall rates anticipated into early Wednesday morning.
Heavier snowfall likely midweek
Snowfall continues through the morning on Wednesday, with the potential for precipitation transitioning to a wintry mix or rain along the southern Great Lakes shoreline. Snowfall accumulations will vary, but a widespread 5-15+ cm is expected.
Blustery winds accompanying the clippers may cause blowing snow and reduced visibility, as well. Be sure to leave extra time for the commute on Wednesday.
Lake-effect snow picks up late week
Lake-effect snow will develop in the wake of the systems late week, especially southeast of Lake Huron and Georgian Bay.
Another system may bring additional widespread snowfall over the weekend.
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Colder-than-normal temperatures are forecast to dominate much of December, accompanied by rounds of lake-effect snow. However, a few milder days may occur if clippers follow a more northerly track.
Stay safe out there as hypothermia can be a real risk this time of year.