Southern Ontario: Snow Squall Outlook for Wednesday, December 8, 2021

Forecast Discussion

The snow squall threat returns to the snowbelt around Lake Huron and Georgian Bay starting Wednesday morning, but this time the focus will be on the Bruce Peninsula and into the region northeast of Georgian Bay. Organized lake effect snow and localized snow squalls will bring accumulating snow to locations such as Tobermory, Britt and Parry Sound with locally as much as 25cm by the end of Wednesday. Road conditions will be quite poor through the affected region especially during the morning and afternoon hours. The squalls should sink back southward by the dinner hour bringing a few hours of heavy snow to the Muskoka and Simcoe County region, however, accumulation will be limited due to the limited duration and disorganization.

The unusual part about this event will be that we may also see some heavy snow off Lake Ontario with the southwesterly flow pushing bands of snow into the Kingston and Brockville region. This will be primarily a concern during the morning and afternoon with general accumulation ranging from 5-15cm depending on how organized the lake effect activity can get. We may also see a few lake effect flurries through the Niagara region from Lake Erie, but accumulation will be very limited with maybe a few centimetres at most.

All snow squall activity will come to an end towards the end of the day. Lake effect flurries may linger in Thursday morning for those close to the shoreline of Lake Huron and Georgian Bay.