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© CBS
Plows and salters were out on Friday trying to clear the highways and streets in Toronto.
On Thursday evening the strongest storm of what has been a relatively gentle winter for Canada's largest city blew into the region, causing traffic snarls, flight delays and generally unpleasant conditions.

More than 150 flights were cancelled or delayed at Pearson International Airport Friday as the tail end of a two-day snowstorm pounded the Greater Toronto Area.

Airport authorities are advising travellers to call ahead to see whether their flights have been grounded.

Parts of the region received between 10 and 15 centimetres of snow throughout the day, making roads slushy and slick.

The Ontario Provincial Police said there were hundreds of weather-related traffic accidents overnight and during the morning commute, including a jack-knifed tractor-trailer on Highway 401 at Dixie Road. There have been no reports of serious injuries.

"My concern is that the drivers, the motorists, have forgotten how to drive in the winter conditions, because we really haven't been faced with a lot of snow this year," said OPP Sgt. Dave Woodford.

On Thursday evening the strongest storm of what has been a relatively gentle winter for Canada's largest city blew into the region, causing traffic snarls, flight delays and generally unpleasant conditions.

A number of school boards north of Toronto cancelled bus service on Friday because of the driving conditions.