Torontonians can expect more terrible weather Friday just before the morning commute, a day after a blinding snowstorm created treacherous driving conditions.

Forecasters say the city will be hit with more freezing rain in the morning, and heavy snow by the afternoon.

On Thursday, police reported hundreds of collisions and vehicles in the ditch, while 200 flights had already been cancelled at Toronto's Pearson International Airport by 6 p.m.

Several GTA schools and bus routes were cancelled ahead of Thursday's storm system, as were night classes.

For a list of cancellations and closures click on "Winter Information Centre" on the right-hand side of this page.

Commuters using public transit also suffered through serious delays.

Motorists getting around the Toronto area were expected to take at least twice as long to get home. Some vehicles were also abandoned on the side of the road after having run out of gas during the current fuel shortage.

One problem spot in Toronto was a steep hill on Avenue Road south of St. Clair, where vehicles were sliding backwards and could not get traction to make it up the slippery slope.

Motorists were urged to drive slowly, leave extra space and stay off the roads if possible.

Police said icy roads and blowing snow could have played a factor in the deaths of two youths in a collision near the southwestern town of Listowel. The victims, who ages are not known, were killed when they car they were in lost control and veered into the path of an oncoming tractor-trailer.

The female driver of the car was taken to hospital with serious injuries.

Environment Canada says the snow will turn to freezing rain in the evening hours.

The precipitation is expected to change to rain at night as temperatures hover at the freezing mark, while winds could reach 70 km/hr.

The weather system coming in from the United States could also make the Friday morning commute tricky, while regions north of Newmarket could see as much as 15 centimetres of snow.

Toronto could see periods of sun Friday afternoon, while flurries are expected on Saturday. Periods of sun and cloud are forecast for Sunday.

With reports from CTV's Roger Petersen and John Lancaster