A winter storm that walloped Ontario last night is moving on to southern Quebec and Eastern Canada, bringing a mix of snow and rain.  

Snow is expected to be heavy at times well into Wednesday afternoon as the powerful low-pressure system from the central U.S. moves east from Ontario, which is still digging out from Tuesday's snowfall. 

Snow and reduced visibility are expected to last late into Wednesday for Quebec and New Brunswick. Heavy rains pelting Nova Scotia are expected to turn into snow later this evening.

The storm will then turn to Newfoundland and Labrador in the evening, where heavy downpours of as much as 50 millimetres of rain are due on Thursday.

Montreal winter storm March 2

Wednesday morning saw a tough commute for those in Montreal and the surrounding areas. (Simon-Marc Charron/Radio-Canada)

The blizzard has led to over 200 cancellations and delays at Toronto's Pearson and Billy Bishop airports. Flights have also been cancelled, delayed or rescheduled at Montreal's Trudeau Airport and at Jean Lesage International Airport in Quebec City. 

Travellers are urged to call in advance to verify their flight's status.

Environment Canada has issued a mix of snow squall and winter storm warnings, and special weather statements, across areas of southern Quebec and Ontario.

The storm is expected to bring at least 20 to 30 centimetres of snow in regions across southern Quebec, where the storm is now turning toward the Gaspé. Freezing rain and extreme cold warnings have been issued for the Laurentians, Abitibi and the Eastern Townships. 

Most Quebec City school boards have cancelled daycare services, while a slew of post-secondary institutions are closed for the day. Dangerous driving conditions such as reduced visibility have prompted highway closures.

Toronto school boards remain open but have cancelled school bus services across the city. Blowing snow has made for a difficult morning commute.

Ottawa and Montreal were largely spared from the storm, with each city seeing about eight to 10 centimetres of snowfall overnight, a far cry from the initial 20 to 30 centimetres that were expected.

Toronto winter storm push

Drivers struggled to cope with snowy conditions on Tuesday night in Toronto. (Mehrdad Nazarahari/CBC)

Many schools across northern and western New Brunswick are closed Wednesday, with the snowstorm expected to bring up to of 35 centimetres of snow for Madawaska and Restigouche counties.

Snow, wind and rain warnings are in effect for parts of Newfoundland and Labrador. 

Nova Scotia is bracing for heavy rain in Halifax, Colchester County and Inverness County, among other areas.