Based on the latest information that I have looked at in regards to the late weekend storm it appears that we may be setting up for a significant ice storm from near Kitchener to just north of Toronto and up toward Barrie then over into the Peterborough region and near Cornwall. In these regions we may have to deal with power outages and very slippery conditions.
The precipitation may be more snow/sleet than freezing rain from Ottawa to Montreal with mostly snow in Quebec.
Sleet and freezing rain may also be significant late Saturday night into Sunday over extreme southern New Brunswick.
For the immediate Toronto area, I expect some ice Saturday afternoon and evening then plain rain Saturday night and Sunday as temperatures just edge above freezing.
It appears that the heaviest snow with the late weekend storm will run from Sudbury/North Bay to Parry Sound then just north of Ottawa and Montreal.
Again, this scenario can easily change with just a slight shift in the track and intensity of the main storm and I will update this again later Friday with a map.
Latest weekly long range interpretation of the ECMWF model
Progressive pattern across southern Canada over the next 6 to 10 days. Also a look at the sea surface temperature anomalies.
Forecast pattern clues through most of July.
Thunderstorms this weekend and a look at the long range.
Some new clues to the summer and fall season.
Amplified jet stream pattern will keep forecasters on their toes over the next week or so.
Weather pattern clues for the next several weeks.