Motorists are being reminded to drive with caution as they contend with messy mix of snow and freezing rain Monday.

Some school districts cancelled school buses due to poor road conditions. Click here for a full list of cancellations.

Because of the weather conditions, police are urging motorists to slow down and leave extra room between their vehicle and the vehicle in front of them, just in case they are forced to come to a sudden stop on a slippery road.

Several collisions were reported during the morning commute, including a jackknifed tractor-trailer on the Toronto-bound QEW near Brant Street in Burlington.

Significant delays were reported on some highways. At one point, traffic was moving at 10 kilomtres-per-hour in Highway 400’s southbound lanes, south of Highway 89, said Ontario Provincial Police spokesman Sgt. Dave Woodford.

By 1:30 p.m., CAA had received more than 2,500 calls for service, resulting in wait times of 45 to 60 minutes in the GTA.

Toronto was expect up to four centimetres of snow accumulation before the temperature climbed above freezing in the afternoon, Environment Canada said.

Rainfall amounts will be less than two millimetres.

Fog patches developed in some regions in the late morning and afternoon.

Airlines issue travel advisories

Because of the weather, Air Canada, WestJet and Porter Airlines are urging customers to check their flight status before heading to the airport in case of cancellations or delays.

In the evening, the warm front is expected to stall over Georgian Bay to east of Toronto, bringing more rain and risk of freezing drizzle overnight.

Less than a week after the City of Toronto issued an extreme cold weather alert, the city is in store for higher temperatures, as a Colorado low moves into the province.

Risk of thunderstorms

For Tuesday, Environment Canada is predicting early-morning fog, rain, an afternoon high of 8 C, a risk of thunderstorms and strong winds.

On Wednesday, a high of 13 C and rain is expected, Environment Canada said.

After that, the temperature will return to normal, with highs of -2 C and -4 C on Thursday and Friday, respectively.

Normal temperatures for this time of year are highs of -2 C and lows of -9 C.

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