Will skies be clear over southern Ontario Saturday night?
Mostly clear skies are expected, except for evening high clouds over southwestern regions caused by some jetstream-level moisture which is forecast to move southeastward from southwestern Ontario during the evening (illustrated below for early evening) and then some low-level clouds are likely to spread across most regions, mainly after midnight, caused by low-level moisture which is forecast to flow southeastward over regions south and east of Lake Huron and Georgian Bay (illustrated below for early Sunday morning).