Will skies be clear over southern Ontario Friday night?

It looks like skies will most likely be clear during the early evening over most regions, followed by increasing cloudiness by midnight.

During early evening, a weak high pressure ridge over southern Ontario will be contributing dry air and diminishing winds, until high-level moisture moves eastward over southern Ontario (illustrated below for early evening) ahead of Saturday’s low pressure trough. Mostly clear skies are likely, except for regions southeast of Lake Huron and Georgian Bay, where lake-effect cloudiness may cause cloudy skies during early evening.

More substantial mid-level moisture that is forecast to move eastward (illustrated below for the hour after midnight) is likely to cause cloudiness over southwestern regions by late evening and all regions by or after midnight.