A snow squall watch has been issued for Parry Sound.  Environment Canada issued the watch around 3:30pm yesterday afternoon for Parry Sound, Rosseau, Port Carling and Port Severn as a cold frontal passage is once again ushering cold air over the relatively warm open waters of Lake Huron and Georgian Bay.  Flurries and local snow squalls are expected to develop this morning and shift southwards during the day with a local snowfall amount of 10 to 15cm.  The squalls are expected to weaken tonight.