Will skies be clear over southern Ontario Friday night?

Mostly clear skies are likely, except for some mid-level clouds that might be visible during the evening, caused by mid-level moisture gradually moving southward from southern Ontario (illustrated below at late evening) and that is forecast to be mainly south of Ontario by about midnight.

Will skies be clear over southern Ontario Wednesday night?
Skies may appear to be partly clear, depending on the thickness of the jetstream-level moisture (illustrated below for late evening) and how much visible cloud forms from the moisture. Over eastern regions (toward Lake Ontario), skies may remain mostly clear while over western regions of southern Ontario, thicker moisture and high cloud may cause skies to appear partly or mostly cloudy.

Will skies be clear over southern Ontario Tuesday night?
Partly clear skies are expected during the evening, and skies will most likely be mostly clear by morning.
The frontal zone moving southward from southern Ontario during Tuesday afternoon will likely have lots of high, mid and low-level moisture remaining over southern Ontario during the evening and the moisture (illustrated below for high-level and low-levels during Tuesday late evening) is forecast to gradually move southward from southern Ontario overnight.

Will skies be clear over southern Ontario Saturday night?
Mostly clear skies are likely over most regions, except for some periods of partly cloudy skies caused by some upper-level moisture (illustrated below for late evening) which is forecast to move over southern Ontario overnight. High clouds caused by the moisture should be easily visible in the bright moonlight.

Will skies be clear over southern Ontario Friday night?
Mostly clear skies are expected overnight. Some low scattered clouds that may be visible at sunset ought to be gone by the end of twilight.

Will skies be clear Tuesday night over southern Ontario?
Mostly clear skies are likely, except for some thin high cloud that will probably be visible over some regions, caused by jetstream-level moisture (illustrated below for late evening) which is forecast to gradually move south of Ontario overnight.

Will skies be clear over southern Ontario Friday night?

Clear skies are expected, except for some high-level thin cloud over the GTA during Friday that might be visible during the evening under the bright moonlight. The high jetstream-level moisture is forecast to move eastward from southern Ontario overnight (illustrated below for late evening) but might cause some high-level cirrus to be visible at sunset from the GTA and northward. 

Will skies be clear Thursday night over southern Ontario?

Clear skies are expected (no details necessary).

Will skies be clear over southern Ontario Wednesday night?
It looks like Wednesday's cloudiness is forecast to move eastward by evening, leaving mostly clear skies overnight. Some low-level cloudiness that develops during the afternoon may take until twilight to dissipate (low-level moisture illustrated below at sunset). By early morning, some mid-level moisture is forecast to move over southwestern regions (illustrated below at morning twilight) and may cause some mid-level clouds.

Will skies be clear Tuesday night over southern Ontario?
Mostly clear skies are expected overnight, except for some high cloudiness that may be visible, caused by some high-level moisture (illustrated below for late Tuesday evening) ahead of an upper-level disturbance which is forecast to move eastward across the Great Lakes region during Wednesday.

Will skies be clear over southern Ontario Monday night?

Clearing skies are expected over most regions by (or after) sunset and by mid-evening over regions near the GTHA following a cold front that is forecast to move eastward across southern Ontario later this afternoon. Mid-level moisture (illustrated below for late evening) may cause partly or mostly cloudy skies over some regions near western Lake Ontario until late evening.

No forecast updates will be provided Friday, Saturday or Sunday.
Back on Monday April 11!

Frank

Will skies be clear over southern Ontario Tuesday night?
Skies might be mostly clear for several hours after twilight in some regions, but increasing high-level cloud will most likely be visible by about sunset. Increasing jetstream-level moisture (illustrated below for late evening) is forecast to move over southern Ontario during the evening ahead of Wednesday's low pressure trough but bright stars, Jupiter, and the otherwise clear air might cause skies to appear clear during the early evening where the increasing high cloudiness is not very thick.

Will skies be clear over southern Ontario Monday night?

Clear skies are expected overnight, caused by a strong high pressure ridge spreading eastward over Ontario with dry and cold air, while moisture and cloudiness with Monday morning’s low pressure trough move eastward from southern Ontario by sunset.

Some low clouds may develop over regions south of Lake Huron and Georgian Bay after midnight and during early morning, where some low-level moisture (illustrated below) may be present.

Will skies be clear over southern Ontario Saturday night?
Cloudy skies are expected until early morning, and then moisture is forecast to move eastward from southern Ontario (illustrated below for early Sunday morning). So, clearing skies are likely in southwestern regions before dawn while other regions of southern Ontario could see some clearing skies before dawn, except for regions south and east of Lake Huron where a northwesterly flow of cold air will help to maintain low cloudiness.

Will skies be clear over southern Ontario Friday night?
Skies may become partly clear by sunset over most regions and remain partly clear until after midnight as a weak high pressure ridge moves across southern Ontario. Lots of low and mid-level moisture is forecast to be present (illustrated below for late evening) and may cause occasional cloudy periods.