The dumping of fresh snow, along with chilly temperatures, created traffic troubles both on the ground and in the air in Central Canada.
East of Toronto on Sunday morning, three people were taken to hospital after a vehicle they were travelling crashed into a cement barrier before being hit by a tractor trailer.
The Ontario Provincial Police said two female passengers in the Toyota RAV4 were airlifted to a Toronto hospital, one in life-threatening condition and the other in critical. The male driver of the vehicle was transported with minor injuries.
It's expected the eastbound lanes of the highway will remain closed for most of the morning.
Winter storm warnings are in effect with snowfall amounts of between 30 and 40 centimetres forecast for southern New Brunswick, and slightly lesser amounts for parts of Nova Scotia and Prince Edward Island.
The storm is expected to hit the region later this afternoon before moving north toward Newfoundland and Labrador overnight.
Both Air Canada and WestJet are offering select travellers the opportunity to reschedule flights before the snow hits.
Montreal's Trudeau airport is also reporting some flight delays and cancellations Sunday morning and has advised people to check the Aéroports de Montréal ahead of time.
Dozens of flights through Toronto's Pearson and Montreal's Trudeau airports were delayed or cancelled yesterday.
Ontario Provincial Police said the weather may have also been a factor in a head-on collision that killed two people near Barrie, north of Toronto.
There were many accidents on snowy roads around the region, including a 20-car pileup on the Queen Elizabeth Highway in Mississauga just west of Toronto.
The storm system was expected to pick up steam as it moves into the Maritimes today.
Winter storm warnings are in effect with snowfall amounts of between 30 and 40 centimetres forecast for southern New Brunswick, and slightly lesser amounts for parts of Nova Scotia and Prince Edward Island.Suggest a correction