A winter storm is expected to move into southern Ontario on Sunday night, bringing significant amounts of snow and a much more difficult commute on the roads by morning.

Environment Canada says a low pressure system tracking south of the Great Lakes will generate snowfall amounts of 25 to 40 centimetres in some areas by Monday night.

https://www.cbc.ca/news/canada/toronto/southern-ontario-forecast-snowstorm-1.6316842