Environment Canada has issued a winter weather travel advisory for the stretch between Oshawa and Kingston.
Meteorologists say that bands of lake effect snow could bring in poor visibility along the Hwy 401 corridor. About 5-8cm of accumulation is expected this afternoon and evening.
Toronto is expecting periods of light snow this afternoon and evening, but not much accumulation.
There is also a special weather statement in effect for all of the GTA and beyond, warning of a cold snap moving in by Thursday night. It is expected to last through Saturday, with the windchill dipping to -30 in the overnight hours.