Will skies be clear over southern Ontario Friday night?

Skies are expected to be cloudy by midnight and partly or mostly clear during the early evening until mid-level moisture spreads eastward (illustrated below for late evening) over all regions by about midnight. The most clear skies will likely be in easternmost regions of southern Ontario, mainly near the GTHA and Niagara Peninsula (as well as eastern Ontario), but high thin cloud may become visible and cause partly cloudy skies well before midnight.