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Ontario: Bitter cold start to weekend with risk of 'sneaky snow'

Friday, November 15th 2019, 8:20 pm - Bitter cold start to the weekend for southern Ontario

An Arctic front dropping south through the province will have positives and negatives for southern Ontario this weekend. Dry air behind that front will mean a taste of sunshine for many, but it also opens the floodgates for another round of bitter cold. And while the frigid pattern does relax a bit next week, late November and early December have a decidedly chilly look. We break down where travel might be tricky on Friday, and how cold it gets this weekend, below.

Time to prepare for the season ahead! The Weather Network's Winter Forecast launches Monday, November 18.


WEATHER HIGHLIGHTS:

  • Shifting winds mean risk for sneaky lake-effect snow Golden Horseshoe/GTA on Saturday
  • Very cold start to the weekend; potential to chalk up another 'top 10 coldest November days' in Toronto
  • Frigid temperatures relax somewhat into next week
  • Stay up-to-date on the ALERTS in your area

SNEAKY LAKE-EFFECT THROUGH SATURDAY

Scattered rain and snow showers dipped south through Friday evening across southern Ontario, as an Arctic cold front drifted south through the region. While these isolated pockets of precipitation will have moved on by Saturday morning, shifting winds mean the snow might not entirely be done with some of us.

Behind the front, east winds picking up Saturday morning bring the risk for some lake-effect snow across parts of the Golden Horseshoe and GTA through Saturday afternoon.

GTALakeEffect

With very dry air in place behind the front, this snow shouldn't amount to much. However, there is the risk for some rapidly changing conditions on roads, including the QEW, if a strong streamer does develop off of the still relatively warm Lake Ontario.

MORE ARCTIC AIR FLOODS IN FOR THE WEEKEND

With only half of the month in the books, November has already added to the list of coldest days on record at Toronto's Pearson International Airport. Saturday's early morning temperature is likely to join that list, as overnight lows once again dip into the minus teens across southern Ontario.

onsatcold

High pressure sinking south behind Friday's front will leave temperatures 10 to 15 degrees below average across the board. Afternoon highs will struggle to climb above -5ºC for most of the region, closer to seasonal conditions for January.

Temperatures will recover to near or just above freezing on Sunday afternoon, which could make for more pleasant conditions for Santa Claus Parades taking place across the region.

MUST READ: Toronto, Ottawa chalk up record cold streaks for start of November

NOVEMBER THAW?

The frigid pattern will finally loosen its grip into next week as temperatures rebound to more seasonal -- and civil -- values, if only briefly.

"A system is expected to track into the region at the end of next week, bringing rain and snow," says Weather Network meteorologist Dr. Doug Gillham, adding that, behind the system, we'll be back into colder temperatures for next weekend.

"Near or below seasonal temperatures will dominate the last week of November and into early December," adds Gillham.

WATCH BELOW: BIZARRE TEMPERATURES SPAN NORTH AMERICA

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