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.