Will skies be clear over southern Ontario Sunday night?
Mostly clear skies are likely over most regions, as high cloud over southern Ontario during Sunday afternoon moves eastward by evening.
Some low-level moisture (illustrated below at 850 hPa level) may cause cloudiness over regions near and west of western Lake Ontario and the GTHA during the evening, and  then some high-level moisture is forecast to move eastward over southern Ontario after midnight (illustrated below at 500 hPa level) and this may cause some high cloudiness to be visible near midnight over western regions and after midnight over most other regions.