Published October 9, 2023 at 9:21 p.m.
The low pressure system stalled in the western part of the province is also causing some inconvenience for our neighbors in Ontario. A remarkable phenomenon will bring huge amounts of rain to these areas. Forecasts.
Unusual in autumn
The lake effect occurs when the air temperature is significantly lower than the water temperature; For this phenomenon to occur, a large area of water is also required. The Thanksgiving holiday will be particularly wet in certain regions around the Great Lakes.
Normally the lake effect occurs in the dead of winter. It’s not uncommon for cities along the Great Lakes to receive more than three feet of snow. This time, with autumn temperatures and north-westerly winds, almost a hundred millimeters of rain is expected to fall east of Georgian Bay, very close to Bracebridge. This lake effect is also notable for its longevity: since most of them are short-lived, the effect associated with the current system will last until Tuesday.
According to meteorologist Stéphanie Bergeron, “The lake effect is essentially the passage of a mass of cold air, in this case from the Arctic, over a relatively hot mass of water, and it is the instability created by this thermal contrast that allows convection.”
Remember, the unusually high levels of mercury over the past few days have helped retain that warmth in the waters. What makes the lake effect phenomenon particularly interesting is the incredible contrast in rainfall amounts: it is not uncommon for one area to receive an extremely large amount of rain or snow, while the neighboring region receives nothing at all.
When we compare ourselves, we comfort ourselves
The system hovering over Quebec and Ontario does not have the same impact: if the lake effect does not have an impact here, the province of La Belle will not be protected from bad weather.
The first snow accumulations of the season occurred on Monday in Abitibi-Témiscamingue and the coming days will be characterized by gray weather in all parts of the province. Note that rainfall accumulations will, however, be lower compared to those expected in Ontario.