According to Brett Anderson at Accuweather:

More snow into the East this weekend
This same storm that forms along the Arctic cold front will spread a band of light to moderate snow across Ontario and into southern Quebec late Friday night and into Saturday. I will detail accumulations in a later post. As the Arctic air wraps in behind the storm Saturday night and into Sunday morning there will be an outbreak of moderate to heavy lake-effect snow in the typical snow belt regions southeast of Georgian Bay and Lake Huron. Strong winds and snow will make for difficult travel and could create blizzard-like conditions.
As the storm hits the Atlantic Ocean Saturday night it will begin to rapidly intensify and slow its forward speed. What does this mean? It means there is the potential for another snowstorm from central and southern New Brunswick through PEI and northern Nova Scotia Saturday night and into Sunday. Southern Nova Scotia might have to deal with a mix of rain and snow Saturday night before it changes to all snow on Sunday. The storm will likely bring snow to southeastern Newfoundland early Sunday before going over to rain, while western Newfoundland could experience a moderate snowstorm.