TORONTO -- It's time to make sure snow shovels are handy as a blast of winter is headed for much of southern Ontario.

Environment Canada has issued snowfall warnings and special weather statements as far east as Kingston.

Forecasters say snowfall amounts of 15 to 25 centimetres are expected Thursday night and into Friday.

Meanwhile in northern parts of the province, residents have been in a deep freeze for weeks.

School buses were cancelled due to the cold in Kapuskasing, where the temperature hit at -39 C.

In southern Ontario, the heaviest snow will occur during the Friday morning rush hour along the Highway 401 corridor from London to the Greater Toronto area and through the Golden Horseshoe.

There could also be heavy and blowing snow for the afternoon commute. Some freezing rain and ice pellets are possible over the extreme southwest.