The Weather Network – Stubborn snow squalls bring travel woes in Ontario before Arctic chill

Sunday, March 27th 2022, 8:09 am – Difficult travel is expected in parts of southern Ontario Sunday, with localized whiteouts possible in areas experiencing snow squalls.

Despite the end of March in sight, the wintry weather will continue to plague southern Ontario for the foreseeable future. A prolonged period of lake-effect snow squalls have come to fruition, and will cause travel headaches for those on the roads. By Monday morning, some communities may see 10-20+ cm of snow. On top of that, a blast of frigid-cold air will send temperatures nosediving into the minus digits Monday morning. More on the timing and what you need to know, below.

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The lake-effect machine is revved up once again in the traditional snowbelt regions in southern Ontario. The snow will continue Sunday and may last into Monday afternoon. Snow squall warnings may be issued at some point on Sunday. Winter weather travel advisories are in effect for a large portion of southern Ontario at the moment.

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The greatest impacts are expected along and near the Huron shores, where treacherous driving conditions are expected to continue at times Sunday.


10-20+ cm of snow is anticipated in the hardest-hit areas, especially near the shores of Lake Huron where the bands could overachieve. Southern shores of Georgian Bay could see similar totals.

Travel impacts could extend into parts of the Greater Toronto Area (GTA) at times, with the odd band meandering into the region. It appears likely that the lake-effect snow will intensify overnight Sunday.

“Prepare for quickly changing and deteriorating travel conditions. Surfaces such as highways, roads, walkways and parking lots may become difficult to navigate due to accumulating snow. Visibility will be suddenly reduced to near zero at times in heavy snow and blowing snow,” says Environment and Climate Change Canada (ECCC) in the advisory.


Consider delaying travel plans across the affected areas. Conditions can change rapidly over short distances.

If the squalls weren’t enough of a nuisance, temperatures will plunge to near-record levels Sunday overnight into early Monday morning.


A small lobe of the polar vortex will dip into the Great Lakes region by Monday.

This surge of chilly Arctic air will push temperatures over 10°C below normal for the end of March and will likely surpass some daily record low temperatures.


In fact, it’s likely that the GTA will be fairly colder than parts of Baffin Island, as parts of the latter bask in temperatures just below the freezing mark.

The lobe of frigid air aloft will modify slightly on its trip south this weekend, but it is what’s to blame for temperatures being significantly cooler for Monday.

Monday morning’s low temperatures across northern Ontario will dip into the -20swhile parts of southern Ontario will be into the minus double digits and teens.

With some lingering gusty northwest winds, wind chills will make temperatures feel even colder, approaching -20 by early Monday morning. These temperatures will likely be a bit of a shock to the system, as it has been a couple weeks since temperatures have been this cold.


While this sudden temperature dive will prove to be short-lived, chilly temperatures will persist into the beginning of April, with no sustained warm weather in sight.

As well, for next week, another system will track later on Wednesday, as March goes out like a lion. The storm track favors rainfall and a brief warm-up across southern Ontario, but at this point it looks like freezing rain will be possible in some of the same regions that saw the ice on Wednesday.

If this storm takes a track as far to the north and west as the models currently show, then we would see a brief warm-up into the teens in southern Ontario on Thursday.

Be sure to check back for the latest updates on the changing conditions across Ontario.

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