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Quickly accumulating snow, difficult travel hits Ontario and Quebec

Monday, February 22nd 2021, 12:26 pm - Rounds of unsettled weather will see out the month of February across southern Ontario and Quebec, starting with some widespread nuisance snow on Monday.

Drivers across southern Ontario and Quebec are facing slower commute times on Monday, as a widespread swath of snow threatens reduced visibilities and tricky travel. Relatively mild air is tracking into the region as well, which means that a mix of snow and rain is possible at times, which could cut into overall totals. Snowfall amounts will range from 5-10 cm for inland regions, but pockets exceeding 10 cm are certainly not out of the question for areas further north. Monday's snow is just the first round in an active pattern setting up for the week, with additional precipitation chances persisting through Wednesday. More on the timing and impact for this final week of February, below.


  • Snow reaches GTA Monday morning, up to 10 cm of snow expected for some
  • Milder temperatures forecast Monday, rising above freezing across the region, could lead to rain-snow mix along lake shores
  • Unsettled weather continues for the first half of the week


An active start to the week is underway, as a system is bringing widespread snow to southern Ontario and Quebec on Monday.

Environment Canada issued winter travel advisories for most of southern Ontario early Monday, warning of impact to commute times as the snow quickly accumulates and reduces visibility. Several areas across western sections of the GTA were dropped from the advisory just after 9 a.m., as the worst of the snow had eased.

ON1 (8)

"Motorists are advised to exercise caution and alter their travel plans as needed," EC says in the statement, which remains in effect for eastern parts of the province.

A southerly flow with this system will bring in a bit of milder air and the chance for mixing in some areas, particularly near the shores of Lake Erie and the Niagara Peninsula. This also means snow accumulations for most areas will not be exceptional.

A widespread 5-10 cm was forecast for inland areas, most of which had fallen through the morning hours, but pockets of 10 cm are possible, especially over high terrain and along the escarpment before it eases later Tuesday. Areas that see some mixing with rain will cut into the totals and will see less than 5 cm accumulate.

ONSnow (32)

Police officials said they had responded to about 75 crashes over the last 24 hours, with about two dozen occurring across the GTA through the early morning commute on Monday. Most schools remained open, though buses were cancelled in Dufferin-Peel, Simcoe County, Guelph and Wellington and Waterloo regions, due to the poor travel conditions right in time for the morning commute.

Snow will subside from west to east across much of Ontario by early Monday evening, though still continuing for the Ottawa region and eastwards into Quebec through early Tuesday morning.

QCSnow (6)


Conditions are expected to remain unsettled beyond Monday, as a couple of weak clipper systems bring additional precipitation chances through the first half of this week.

The first, on Tuesday, will bring the chance for an additional 3-5 cm of snow in some areas. Wednesday will see another system, but with more mild air potentially in the mix, southern areas will see more rain mixing in.

These could possibly be the warmest temperatures for the region since December.


By the end of the week, high pressure and fair conditions are expected to re-establish, with temperatures sitting closer to seasonal values for Thursday and Friday, before another climb heading into the weekend.

Be sure to check back for the latest updates on the weekend system that threatens Ontario.

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