Will skies be clear over southern Ontario Monday night?
Mostly clear skies are expected, due to a high pressure ridge over Ontario (illustrated below) causing subsidence and a light northerly flow of dry air over southern Ontario, except for some low-level cloudiness that may be over some regions during early evening, especially near western Lake Ontario, caused by some low-level moisture (illustrated below for late evening) that is expected to move eastward from southern Ontario during the evening.