Thursday, 12 September 2019


Will skies be clear over southern Ontario Thursday night?
Mostly clear skies are expected over most regions, except for some cloudiness over southwestern regions, caused by mid-level moisture over southwestern Ontario overnight (illustrated below for early evening) and except for some high clouds that may appear over most regions overnight, due to jetstream-level moisture over most of southern Ontario.




Monday, 9 September 2019


Will skies be clear over southern Ontario Monday night?
Partly cloudy skies are expected, due to widespread high clouds over most regions caused by jetstream-level moisture (illustrated below for late evening) and some cloudiness caused by mid-level moisture especially over southwestern regions (illustrated below for late evening).





Saturday, 7 September 2019


Will skies be clear over southern Ontario Saturday night?

Mostly cloudy skies are expected, due to lots of low-level moisture (illustrated below for late evening), except for partly clear skies near Lake Ontario with lots of high cloudiness due to widespread jetstream-level moisture (illustrated below for late evening).




Friday, 6 September 2019


Will skies be clear over southern Ontario Friday night?
Mostly cloudy skies are expected, except for partly clear skies that could occasionally appear over some regions where breaks in the cloud cover develop.

Thursday, 5 September 2019

Will skies be clear over southern Ontario Thursday night?
Mostly clear skies are expected during the evening, except for some mid-level clouds that may appear over some regions, and then increasing cloudiness is likely by about midnight as moisture and cloudiness moves eastward over most regions before morning (illustrated below for mid-level moisture around late evening).


Wednesday, 4 September 2019


Will skies be clear over southern Ontario Wednesday night?
Mostly clear skies are expected over most regions, except for regions south of Lake Huron and Georgian Bay, where some cloudiness is likely to persist during most of the evening, caused by low-level moisture flowing southward from the lakes (illustrated below for early evening).



Monday, 2 September 2019

Will skies be clear over southern Ontario Monday night?
Mostly clear skies are expected during the evening, except for some early-evening clouds caused by mid-level moisture which is forecast to move eastward from southern Ontario during the evening (illustrated below for early evening), and then low clouds and fog may develop after midnight over many regions.