|A burst of moderate snow on L'Ile Perrot last night left about 8cm on the ground. (ValleyWX)|
A large upper level low will slowly drift across eastern Ontario and southern Quebec well into Friday with periods of snow. The snow will be light most of the time with amounts in the 5-10cm range by late Thursday with higher totals across the snow belts of the Great Lakes and in the mountains north and southeast of Montreal. Friday looks fair at this time before another low and frontal system approaches the St. Lawrence Valley for Saturday. Temperatures will be slightly cooler today around -3C but warm to the freezing point for the balance of the week. Overnight lows will generally be mild around -5C.