Environment Canada has issued a special weather statement advising that much of Southwestern Ontario, including London, will face deteriorating driving conditions as an Alberta clipper sails across the region.
The statement issued at 5:12 a.m. forecasts that 10 to 15 cm of snow will fall from Grey-Bruce east across Muskoka into the Ottawa Valley.
Further south, most regions are expected to receive five to 10 cm of snow, except Windsor and Chatham where amounts are forecast to be less than five centimetres because of ice pellets or freezing rain.
After the front moves through, brisk and gusty northwesterly winds will bring in colder Arctic air, starting Thursday evening.
Motorists should expect to deal with poor winter driving conditions as untreated roads become snow covered and slippery. Low visibility in snow and occasional blowing snow may also contribute to poor winter driving conditions, Environment Canada said.