The hard, cold rain that had started coming down the night before had eased off considerably by the morning of Friday, May 31. (McCullough p.79)
Parke dressed quickly, went...out the porch door,...where, for the first time, he heard...a "terrible roaring as of a cataract" coming from the head of the lake to the south. He also noticed that during the night the lake had risen what looked to be perhaps two feet. (Supra 89)