About 10 centimetres of snow fell overnight, and by morning the snow had turned to rain in much of the Montreal region.
The first major winter storm of the year is expected to dump a total 15 to 25 centimetres of snow in the Montreal and Laval region, including what fell overnight from Tuesday to Wednesday.
Environment Canada has issued snowfall and rainfall warnings throughout the province, as the low-pressure system that originated in the Gulf of Mexico swings through.
CBC weather specialist Frank Cavallaro said the morning rush our will get messy, as temperatures rise.
“There is a chance of freezing rain, mainly between 5:30 a.m. and 7:30 a.m.,” Cavallaro said.
City of Montreal officials are urging drivers to use public transit, especially if they have not installed winter tires on their vehicles yet.
Environment Canada is warning people to consider delaying their travel plans.
Some flights in and out of Montreal's Pierre Elliott Trudeau International Airport were also delayed or cancelled Wednesday morning.
Conditions are expected to turn drier and much colder by Thursday.
“The winds will pick up Wednesday night into Thursday — 60 to 70 km/h. It will be sunny Thursday, but much colder — with the winds, it will feel like -18. It will feel more like mid-December,” Cavallaro said.
This storm marks the first snowfall accumulation for the Montreal area this season. Last year, the first accumulation occurred on Nov. 28, when about two centimetres of snow fell.