Our own club's Heidi Anderson provided an impromptu discussion of lake levels.  After reaching a low in 2013 an icy winter reduced evaporation.  Then followed years of high precipitation which raised the lake to current levels. There are too many factors that affect lake levels to form a regular pattern. The current expectation is the the lake will rise another 12-18 inches.  In the long term levels will likely fall.  The normal swing between high and low levels is six feet.