The Weather Network's Kevin Yarde was near Barrie early Monday and says road conditions became treacherous fairly quickly.
"A tractor trailer actually pulled over and then when he tried to leave, he got stuck," says Yarde.
According to Environment Canada, cold west to northwest winds will continue to generate lake effect snow bands, which could become relatively stationary throughout the day.
Motorists in the area should expect dangerous driving conditions as untreated roads will rapidly become snow covered and slippery. Visibility may also be reduced to near zero in bursts of heavy snow.
Up to 20 cm of snow is expected in the hardest hit areas through Tuesday.
Over the weekend, snow squalls which fired up late Friday, also made for poor driving conditions in some places.
"There's heavy squalls over the 401 this morning," said camera operator Mark Rozitis, who was in the thick of the storm near Woodstock on Saturday.
While less than 10 cm of snow was reported there, reduced visibility and slippery roads lead to several accidents throughout the day.
Wondering what the winter season will be like in your area this year? Be sure to check out The Weather Network's 2012/2013 Winter Outlook.