Back-to-back wintry, snowy bursts interrupt Ontario's spring tease

Back-to-back systems will bring a large swath of snow to all of Ontario this week, adding another 10-15+ cm of snow accumulation to portions of southern Ontario

With the rise in temperatures in southern Ontario this week, the concern over flooding in some locales has increased with the snowmelt.

But the warmth doesn't mean the end of winter weather. In fact, snowfall will return to the province on Wednesday as the next system brings a coating of snow, and even a chance of freezing rain and drizzle for some areas. However, this will only be a taste of what's to come later in the week as a second system takes aim.

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While no excessive amounts are expected with this first system, roads across southern Ontario will be slippery from this week's melting snowpack as a result of the mild temperatures. Combined with falling snow, it could make for some dicey travel.

Another, more potent system taking aim at the province on Friday will bring heavy snow to northwestern Ontario as well as southern Ontario.

Stay up-to-date on your local weather alerts, and be sure to check the latest highway conditions before heading out on the roads.

WATCH: The snow is melting, but that brings up a safety issue

Wednesday and Thursday: Rain and snow chances increase in southern Ontario

A weak low-pressure system will track in late Wednesday afternoon across southwestern Ontario, reaching the GTA by Thursday morning.Ottawa and the rest of eastern Ontario will also see a dusting of snow throughout the day Thursday.

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Across the southwest, Lake Erie shorelines and through the Niagara region, precipitation will be a rain-ice mix to start the event, but will be quickly followed by rainfall.

Southern and eastern Ontario forecast snowfall accumulation through Thursday - Feb. 26, 2025

Meanwhile, those north of the GTA will likely see some wet, heavy snow in the 5 cm range. As the morning continues, however, we'll see the snow transition into a sloppy mix of rain, snow, and ice, persisting in flurries throughout the afternoon.

Blustery winds from the northwest will also enhance snow totals along the snowbelts, as well as create blowing snow over roads and highways.

Friday and Saturday: Persistent systems brings an even snowier blast to Ontario

Another blast of snow will bring up to 10 cm of snow to southern Ontario and the GTA on Friday.

This system actually originated as a low over the Pacific Ocean, where it travelled into Yukon and is reorganizing as it prepares to dive south towards the Great Lakes.

Northern Ontario forecast precipitation Friday morning - Feb. 26, 2025

Before the system arrives in southern Ontario on Friday afternoon, it will leave a large swath of snow over northwestern Ontario. 20-25 cm of snow is forecast for the Thunder Bay area, which will impact travel within the city as well as along portions of the Trans Canada Highway.

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The snow will reach the GTA by late Friday afternoon, just in time to impact the evening commute.

Ontario widespread snowfall outlook through Saturday - Feb. 26, 2025

There is still some uncertainty about the exact track of this system into southern Ontario; however, early forecast models suggest a swath of 5-15 cm of snow is likely from the Huron shores into the GTA and across eastern Ontario.

We could also see some rain and mixing within the snow at times, but where that will be will largely depend on the exact track of the system.

Be sure to check back on Friday, Feb. 28, for The Weather Network's official March outlook.

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