Southern Ontario: Snowfall Outlook for Thursday, December 23, 2021

Forecast Discussion

A fast-moving system is expected to bring a blast of snow to areas east of Lake Huron and into the GTA beginning Thursday late afternoon. It will continue throughout the evening hour with the snow tapering off just after midnight. In addition to this, the Sarnia and Chatham-Kent region could see some brief freezing rain just in time for the Thursday evening commute. Windsor should mainly see rain from this system. As for accumulation, this will be a fairly weak system in terms of moisture content so we expect around 2-6cm (locally as much as 10cm, but that seems unlikely) from the Lake Huron shoreline through K/W and into the GTA. Lower totals may be found along the shoreline of Lake Ontario as temperatures will be very close to the freezing mark. For those hoping for a White Christmas, we don’t expect the snow to stick around until Christmas with a warm-up on Christmas Eve and rain expected.