The storm is going to be a VERY messy storm for all of southern and eastern Ontario. Currently the models are converging on a track that take the storm center just south of Lake Erie and over Lake Ontario to eastern Ontario by Monday morning. To the north and west of the storm track will be heavy snows with high ratio liquid equivalent values due to the very cold air behind this. If the current track and timing holds, the we will be getting 10-15 cm of snow overnight Sunday with mixed precip Monday morning, changing back to snow Monday afternoon, after the storm center passes.
Here is the latest snow map from A/W. Not to many arguments with it at this point. Hoping for a 50 mile shift south though. Note that it goes only to Sunday and doesn't include the precip Monday.