A winter storm watch is already in effect, and the most precipitation is expected to descend upon highways through northwestern Ontario and Lake Superior's north shore. Still, snowfall amounts will depend on the storm's path, which, the weather agency says, could "drastically change who sees 15 cm of snow and who sees 30 cm." Unfortunately, southern Ontario isn't getting off scot-free and will still feel the system's effects despite being out of its path. Snow-rain showers are expected to begin in Toronto on Wednesday evening and transition to wet snow by Thursday morning. After a small, sunny break on Friday, more snow is forecast for Saturday night into Sunday, when we'll see lots of mixed precipitation, from snow to snow-rain showers.