Heavy snow and freezing rain made the morning commute a difficult one but city crews say the cleanup will likely be finished by the end of the day.

After a record snowfall in February, March began with another 15 centimetres in the Greater Toronto Area.

Slippery road conditions caused numerous accidents, school bus cancellations, forced flight delays and slowed down public transit.

Environment Canada ended its snowstorm warning for southern Ontario but still warned motorists to be cautious on the roads.

"Travellers should be prepared to alter plans accordingly as driving conditions are hazardous across all of southern Ontario," the agency said in a notice posted on their website.

By noon, the city's snow plows and salt trucks were already on their third snow-clearing run on major routes and highways. They've already started on sidewalks and side streets. Officials say they hope to have the job done by midnight.

About 10 centimetres fell in Toronto overnight and an additional five centimetres was expected to fall in the region before the day's end.

In eastern Ontario, 10 to 15 centimetres of snow fell overnight and forecasters predicted the area could be hit with another 15 centimetres by the day's end.

The storm is expected to end in the afternoon. However, Environment Canada predicted more snow would fall throughout the week. Forecasters said there is a 40 per cent chance of flurries on Thursday and a 70 per cent chance of snow on Friday.

Delays and cancellations

School boards across southern Ontario announced bus cancellations Wednesday morning although most schools remained open.

Seneca College has closed its King campus for the day. A notice on the college's website said its other campuses would remain open. York University has not cancelled classes for the day but warned students to check its website for updates throughout the day or to call their department.

GO Transit buses in the Toronto area are operating about 25 minutes late but north of the city, GO Buses are expected to be about 90 minutes behind schedule because of the weather conditions.

Nearly 300 delays and cancellations were reported out of Pearson International Airport but conditions were expected to improve by the afternoon with snow clearing.

Passengers are being warned to call ahead for the status of their flight. They are also told to check back often as weather conditions are expected to change quickly.

Stranded motorists can also expect a delayed response from CAA. An official with the organization said they received more than 2,000 calls this morning. Members were told the wait would be about one hour for roadside assistance.

Treacherous roads

Slippery conditions caused a number of accidents on GTA roads and highways.

The Ontario Provincial Police said Wednesday morning they were receiving crash reports about every three minutes. Hundreds of accidents have been reported since the storm started at about 8 p.m. Tuesday, officials said.

Traffic delays on the local highways were mostly due to cars spinning out because of the slippery conditions.

Snow tires can be a huge help, OPP Const. Dave Woodford told CTV Toronto as he pointed to a vehicle that landed in the ditch.

"She was missing snow tires and sometimes, that can make a big difference," he said.

On Highway 400, a motorist was sent to hospital with non life-threatening injuries after his car was struck by a transport truck.

Officials are warning commuters to give themselves extra time to arrive at their destination today. They also say to drive according to the weather conditions and are reminding motorists not to speed.

Reckless driving is the number one cause of accidents in these type of weather conditions, officials said.

The city's cleanup crews said most of the snow that fell in February has been cleaned up, leaving them enough space to push today's snowfall to the curb.

With reports from CTV Toronto's Galit Solomon and Matet Nebres