Southern Ontario: Winter Weather Hazards Outlook for Saturday, December 4, 2021

Forecast Discussion

There is the potential for snow squalls to develop off Lake Huron and Georgian Bay starting early Saturday morning and continuing through the day. The initial flow will favour the stronger bands to stretch across the Bruce Penisula and into Northern Muskoka, Parry Sound, Britt and Sundridge through the morning and afternoon. We expect the wind direction to change to a more northwesterly flow which will shift the band southward through Muskoka and into Simcoe, Bruce and Grey counties sometime during the late afternoon and evening. The squall activity may linger into Sunday, but confidence on that is low at this point.

It appears that some locations within the risk zone could pick up over 10cm of accumulation (and perhaps significantly more than that) by the end of Saturday. Not everyone will see this much snow, but the potential is there. We will further break down the areas that are most likely to see the heaviest snowfall in our accumulation forecast to be issued Friday afternoon or evening. Be sure to check back for more details on the impact and timing.