By Jan. 22, weekly ice coverage across all five Great Lakes was at 23 percent, according to the Canadian Ice Service of Environment Canada. That's slightly above the 30-year average (1981-2010) of about 19 percent for that week. After next week those numbers are going to skyrocket. But in the meantime, the lake effect snows should be substantial in places where the ice has not taken hold yet, Buffalo for one such place.