Will skies be clear over southern Ontario Tuesday night?
Mostly cloudy skies are expected, except for regions near western Lake Ontario including the GTHA during the evening, where increasing mid-level cloudiness is not forecast until late evening or midnight. Jetstream-level winds will also be over southern Ontario and so high-level thin clouds may be visible at sunset and during the evening before the mid-level moisture (illustrated below for late evening) causes increasing cloudiness.