Will skies be clear over southern Ontario Saturday night?
Most regions are likely to be under clear skies during the evening, except for regions south and east of Lake Huron and Georgian Bay, where low-level cloudiness is expected (illustrated below for early evening) due to cool air, warm lakes, and the lake-effect cloud process.
More cloudiness is expected to move eastward over southern Ontario and to cause partly cloudy skies during early morning ahead of a low pressure trough.