Will skies be clear over southern Ontario Friday night?
Mostly clear skies are expected during the evening until increasing high cloudiness appears later in the evening, except for southwestern regions where mostly cloudy skies are expected by mid-evening, caused by jetstream-level moisture which is forecast to move eastward over southwestern Ontario during the evening and over the rest of southern Ontario by about midnight (illustrated below for late evening), followed by increasing mid-level cloudiness later in the night.