Winter isn’t going to give way to spring without an April snowy blast in southern Ontario.

A polar vortex moved into the region Sunday, and was expected to bring high winds and significant snowfall to much of southern Ontario by early Monday morning.

Environment Canada had issued snowfall warnings beginning Sunday afternoon and lasting overnight into Monday for cities such as Hamilton, Toronto, Guelph, Kitchener, Cambridge, St. Catharines, Niagara Falls, Burlington and Oakville.

Many areas could see up to 20 cm, with gusting winds and reduced visibility, the weather agency said. The wintry blast is expected to be a problem for Monday’s morning commute.

Toronto and the GTA could see somewhere between 5 cm and 10 cm of snow.

At least 13 people were injured in a 20-to-40 vehicle pileup on Highway 400, near King Township outside Toronto, as the wintry conditions began to set in on Sunday.

If that’s not bad enough, temperatures on Monday are expected to be well below seasonal averages.

Lows are forecast to hit -10 C in Toronto, -11 C in Kingston, -13 C in Ottawa and -32 C in Timmins.

Winter has not taken a quiet exit in southern Ontario. After some flurry activity Saturday, residents woke up to some chilly temperatures and a coating of snow in some areas Sunday.

In some areas of southwestern Ontario Saturday, flurries created white-out conditions.

Newfoundland and Labrardor

Much of Newfoundland and parts of Labrador are also under a wind and snowfall warning for Monday.

Parts of the region are in for potentially damaging winds, gusting up to 130 km/h, and accumulating snow of 10 cm to 25 cm. The strong winds and blowing snow are expected to result in "near-zero" visibility in some areas.