Another round of snowfall for Ontario before Arctic air sweeps in
Another system is heading across Ontario Friday night into Saturday morning, bringing widespread snow across the province.
While totals won't be anything overly significant with the weaker systems, it could still be enough to slick up the roads and slow the commute at times. Drivers are urged to prepare for quickly changing and deteriorating travel conditions.
DON'T MISS: Why we go from cold to brutally cold, mid to late January
Beyond a brief early weekend warm-up, the coldest temperatures of the season will flood the province on Sunday, and through much of next week. In some areas, these will actually be the coldest conditions in years.
Rounds of system snow as we head into the weekend
Another low pressure system will move through Ontario Friday night through Saturday morning bringing a widespread snow, though with variable totals, to kick off the weekend.
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Between 5-15 cm of snow is forecast for northern and central Ontario, and areas along the Lake Huron shorelines, while less than 5 cm of snow is likely for the Highway 401 corridor. The snow could mix with rain near Lake Ontario and Lake Erie.
Strong winds will develop ahead of the cold front, with gusts of up to 40-60 km/h are possible.
A warm front will shift the winds to the south, which will bring in milder temperatures for a good chunk of the province. Saturday's highs will range from +1°C to -3°C, but this warm-up will be brief.
Sudden drop in temperatures as Arctic air floods in
Arctic air is expected for Sunday and most of next week, with the coldest conditions of the season set to flood through the province.
In parts of northern Ontario, the temperatures will drop about 24°C in just 24 hours, and roughly 30°C in 36 hours!
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The drop isn’t as extreme in southern Ontario, but most areas will see a noticeable 15°C temperature tumble from Saturday afternoon to Sunday morning, with a chillier 20°C plummet expected across central regions.
The first cold day will be Sunday, with the Arctic air mass staying in place until Wednesday.
Several days of lake-effect snow are likely for the snowbelts next week, as well, but changeable winds should spread the snow over a larger region and prevent exceptional snow totals.
Some cold weather stats
For many areas, these will actually be the coldest conditions felt in years.
Kenora: Monday's forecast high of -28°C would be the first time plunging that low since January 2019
London: An overnight low temperature of -22°C will be the coldest since 2022
Ottawa: An overnight low temperature of -27°C will be the coldest since February 2023
Toronto: Tuesday's daytime high of -15°C will be the coldest daytime high since January 2019
Colder-than-normal temperatures are expected to continue into the final week of January. As we approach the beginning of February, however, and progress through the first half of the month, much milder air will surge north into the eastern U.S. and attempt to push north of the border into the region. This will bring a milder pattern, but it is too early to know whether this will actually bring an extended period of early spring-like weather, or if this will bring messy storms with an active storm track across the region.
