A snowfall warning has been issued by Environment Canada for Barrie, Collingwood, Orillia, Midland, Hillsdale, Coldwater, Orr Lake, Lagoon City and Washago.
Snow is expected to begin early Wednesday morning and will become heavy that afternoon, continuing through Wednesday night before tapering off to a few flurries Thursday morning, Environment Canada says.
Total snowfall amounts of 15 to 25 centimetres are expected.
According to the federal weather agency, the snow is the result of a low-pressure system from the central U.S. that is forecast to track over eastern Ontario Wednesday night.
“Be prepared to adjust your driving with changing road conditions,” Environment Canada says. “Visibility may be suddenly reduced at times in heavy snow. There may be a significant impact on rush hour traffic in urban areas.”