Rare Late-Season Lake Breezes in Southern Ontario

Come September or so in southern Ontario, daytime maximum temperatures begin to rapidly decline while lake surface temperatures on the Great Lakes remain relatively warm. Since the driving force of the lake breeze is the difference in temperature between air over land and air over lake, the frequency of these circulations also declines rapidly in the fall months. However, conditions occasionally become conducive to lake breeze development even into late fall. I have documented two recent events of this nature. The first occurred on October 30, 1998 while the second occurred on December 4, 1998. Click on the appropriate link below for an account.

October 30, 1998

December 4, 1998