As I write this, a "supermoon" is waxing. That bigger-than-average full moon also means bigger-than-average tides. When the tide runs farther up the beach, the water snatches more driftwood and debris from the shoreline. In turn, this means more flotsam in the water that we boaters have to watch out for. So keep an especially sharp eye out in the days following higher-than-normal tides. The same holds true for freshwater following periods of high water caused by flooding, seiche, rains, or water management.