The CBC’s Claire Martin said that a weather system was approaching the city from the west.
"This isn’t huge snow, but it will definitely make the roads a little slick," she reported on CBC News Toronto.
The incoming flurries "will be right on our doorstep" by the time the morning commute rolls around, Martin said.
Areas in and around Toronto were likely to see three to five centimetres of snow accumulate through Tuesday afternoon, she said.
However, Environment Canada issued a special weather statement on Monday evening, which suggested that some areas close to Lake Ontario could see up to 10 centimetres of snow overnight and into Tuesday.
The weather agency also said "snowfall amounts will drop off quickly to near two centimetres as one heads inland away from the lake."