10/31/2025
Be prepared!
❄️ Warm Lakes & Cold Consequences: Southern Ontario is Bracing for Another Intense Lake Effect Snow Season ❄️
On the heels of a record-breaking summer that brought 30°C into the beginning of October, we’re seeing the seasonal temperatures as we come to the end of October. Despite this heat being behind us, we’ll be dealing with its residual impacts when we begin to experience lake effect snow later in the fall and into winter in Southern Ontario.
One of the main ingredients for the formation of lake effect snow is a large, unfrozen body of water. A warmer summer leads to warmer lakes which take longer to freeze. The longer that the Great Lakes have large open patches of water, the longer that lake effect snow machine will threaten the traditional snowbelts.
The current surface temperatures across the Great Lakes are very similar to last year at the same time. Many will remember last fall when the Muskoka Region was buried after several days of intense lake effect snow, trapping people in their homes and cars after the highways were closed.
This trend continued through most of the winter due to large expanses of open water remaining present in the Lakes. This was particularly the case in Bruce, Grey, and Huron Counties, where consistent lake effect snow resulted in massive snow piles and drifts that were up to 12 feet tall! The amount of snow also had a major impact on local schools, with more than 30 snow days announced for students attending some school boards.
While it is still too early to predict exactly how much snow will fall, and where, over the coming months, it is looking likely that we can expect a considerable amount of lake effect snow like last year.
- Alannah