Figure 8. Storm tides along the coast included a surge of about 1.5 feet on top of a large 11-foot tide to extend the water level to over 12 feet as measured at the Portland tide gauge. This high water level combined with offshore waves peaking at 12 feet every 8 seconds around the time of high tide allowed surf to impact the dunes and undermine trees at Popham Beach State Park. Graph courtesy of the National Ocean Service with data recorded at Portland, Maine.
Last updated on February 1, 2010