Will skies be clear over southern Ontario Saturday night?
Mostly cloudy skies are expected over most regions overnight due to extensive low-level moisture flowing southeastward from Lake Huron and Georgian Bay (illustrated below for mid-evening), although partly clear skies may develop occasionally. Partly clear skies are likely before morning over most regions as the northwesterly flow backs to southwesterly, but increasing mid-level cloud is forecast to move eastward over southern Ontario.