Will skies be clear over southern Ontario Wednesday night?
Skies are likely to become mostly clear over regions near western Lake Ontario, the GTHA and southern Georgian Bay by the end of evening twilight, except for some thin high cloud that may be visible, while cloudy skies are expected over southwestern regions, and some amount of high cloudiness is likely to be over regions between southwestern Ontario and Lake Ontario due to jetstream-level moisture (illustrated below for Wednesday evening). Then, before morning, low clouds or fog may develop over locations where the sky remains mostly clear, while increasing cloudiness is expected to spread northeastward over southern Ontario.