Will skies be clear over southern Ontario Tuesday night?

Skies will most likely be clear by twilight, as a weak high pressure ridge moves eastward across southern Ontario overnight, and skies are clearing as expected during Tuesday afternoon with some afternoon convection cloudiness likely to diminish around sunset and jetstream-level cloudiness moving eastward following the cold front.

Some haze may appear in the sky (or may remain invisible) resulting from a thick plume of smoke aloft from forest fires in Saskatchewan that is moving eastward across the central Great Lakes region during Tuesday afternoon and is expected to move eastward overnight toward southern Ontario.