Travellers taking to the road tomorrow will need to know about an incoming weather system that is expected to bring varying amounts of snow to the region overnight. Environment Canada's Geoff Coulson says 15 to 20 centimetres could hit along the North shore of Lake Superior but other areas around the region, including Thunder Bay will see less accumulation. Coulson says the tail end of the system will bring much cooler temperatures over the coming week with highs of minus 5 and 6.