Looking at my daily satellite photos it looks like Superior is about 80% covered with floe ice and a solid sheet covering a considerable swathe at the eastern end. Looks like most of Georgian bay is froze over with Lake Huron being almost covered with floe ice. Michigan is largely open but there is considerable floe ice and the straits of Mackinac are froze solid. Erie is pretty much froze over and Ontario is the most open.
From the day before yesterday.
