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Extra care advised on southern Ontario roads Thursday as snow returns

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It was inevitable, southern Ontario. We knew we couldn’t hold off the snow for the rest of winter. Get ready for the return of slippery roads, slower commute times and reduced visibility on Thursday.

RELATED: Record warmth melts Great Lakes ice to historic February lows

The first fair amount of snow in a few weeks will return. Accumulations will vary, depending by location, but a range of 5-20 cm is expected for southern Ontario through Thursday. Needless to say, travel may be hazardous, especially in the hardest-hit regions. As well, high winds may cause tree branches to break and may result in local power outages.

While Thursday’s system will be short-lived, it won’t be the end of the snow, however. Behind the system, a multi-day, lake-effect snow event with strong, northwesterly winds will create blowing snow and dangerous whiteout conditions a times.

Snow spreads back into southern Ontario for Thursday

A low will track into Ontario Thursday with snow starting along the lakes Huron and Superior shorelines Thursday morning.

Snow will track east through the day with snowfall rates picking up for the afternoon and evening, reaching the Greater Toronto Area (GTA) late afternoon and the Ottawa region after the evening commute.

image4Southern Ontario can expect a tricky Thursday evening commute. If you can leave work before 3 p.m. to 4 p.m., it may help missing the worst of the snowfall in Toronto.vModerate snowfall paired with 60-80 km/h winds will reduce visibilities along major highways.

Winds will begin in the southwest –– from Sarnia, London and along the Niagara Peninsula by Thursday afternoon –– making their way into the GTA by the evening.

Localized power outages may also occur where the strongest gusts occur.

image5Snowfall amounts will be highest around and near Lake Huron and Georgian Bay –– with a potential for up to 20 cm –– and lowest in extreme southwestern Ontario as some mixing could occur, thereby reducing accumulating snow.

Accumulations of 5-15 cm are expected for most areas, with 5-10 cm expected in the GTA.

image7If the forecast trends on the high end, it will be quite a season slip for the city. The last time Toronto recorded near 10 cm of snowfall was nearly a year ago in March 2023.

It’s a rather quick system, however, so snowfall will end for the GTA Thursday overnight and by Friday morning for Ottawa, leaving a fresh blanket of snow.

Lake-effect snow threat kicks off the long weekend

The snowfall totals do not include accumulations from the lake-effect bands for Friday into Saturday morning. Once the system snow has passed, lake-effect squalls will settle in behind, bringing continued snowfall to Lake Huron shores Friday.

image3The Midwest low snow, along with the lake effect, will make the Family Day weekend a great one to get out and enjoy the fresh new snow with some winter activities.

The wind will diminish Friday afternoon and evening, but breezy conditions will return at times again during the weekend.

Temperatures next week will be within a few degrees of seasonal. No major storms are expected through the middle of next week.

Thumbnail courtesy of Peter Lu/Submitted.

Keep checking back to The Weather Network for more forecast information and updates on your weather across Ontario.

WATCH: Record winter warmth sends Great Lakes ice to unprecedented lows

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