Potent storm could bring 15-30 cm of snow to Ontario, Quebec this week

Digital Writers
·3 min read
Potent storm could bring 15-30 cm of snow to Ontario, Quebec this week
Potent storm could bring 15-30 cm of snow to Ontario, Quebec this week

Embedded content: https://players.brightcove.net/1942203455001/B1CSR9sVf_default/index.html?videoId=6232209210001

A snowy system that is tracking through the U.S. Central Plains will soon impact southern Ontario and Quebec. Southwestern regions in Ontario will be the first to see the snow on Monday morning and then Ottawa and parts of southern Quebec will experience the snow in the evening hours. This wintry precipitation will be a warmup for the potent system that will track in on Monday night. A number of regions across southern Ontario and Quebec, including parts of the GTA, could see up to 20 cm of snow through Tuesday. Details and timing, below.


  • Weak system moves through on Monday with widespread snow, but light accumulations; lake-effect snow for Lake Huron

  • Heavier snow expected from a U.S. system that will clip the province Monday night into Tuesday


A low pressure system that tracked into southern Ontario on Sunday evening will reach the GTA in the pre-dawn hours Monday morning. Many areas will see between 5-10 cm by the afternoon hours before the precipitation tapers off.

Some areas near Lake Huron are expected to see snow squalls develop in the afternoon before strengthening in the evening. They will then ease and transition to snow overnight as the next low-pressure system approaches the area.


There will be a brief lull late in the afternoon into the evening before the next round of snowfall pushes into the region, which is associated with a potent northeast U.S. system. The snowfall will intensify overnight Monday through early Tuesday morning, eventually clearing out in the afternoon.

Forecast models have gravitated towards higher snowfall totals in parts of southern Ontario by Tuesday. Between 10 to 15 cm is anticipated for the GTA including Toronto, which includes accumulations from the Sunday night system. Higher amounts are expected in the Niagara region where up to 30 cm is possible.


Embedded content: https://players.brightcove.net/1942203455001/default_default/index.html?videoId=6232215815001

In Quebec, Environment Canada warns that over 15 cm of snow is possible by Tuesday in major urban areas, including Montreal. Powerful wind gusts could cause blowing snow in the St. Lawrence Valley, which will reduce visibility on the roads and could cause hazardous conditions.

“[The wind] could significantly impact rush hour traffic in urban areas. Expect hazardous driving conditions due to low visibility,” Environment Canada warns.

Beyond, forecasters are eyeing a late-week system. While there's currently low confidence in the snow forecast, it'll still be a storm to keep an eye on as the week progresses, The Weather Network meteorologist Dr. Doug Gillham says.

"If this storm verifies, our seven-day snowfall totals for parts of southern Ontario could be rather impressive with the parade of storms," says Gillham.

At this point, it looks like near-normal or colder than normal temperatures will dominate for the final week of February.

Thumbnail courtesy Mark Robinson

Be sure to check back for the latest on the winter weather in Ontario.