Just a quick update... the surge is now about 2 feet above the astronomical tide at Nantucket, with about an hour until high tide. The 3 ft. astronomical tide, plus the 2 ft. surge will lead to 5 ft., which is the threshold for the start of some minor coastal flooding in Nantucket Harbor -- although 5.5 ft is when more significant flooding occurs there. -- Glenn Field NWS - Norton, MA If you have any questions or would like more information, don't hesitate to contact us via this email address, on NWSChat <https://nwschat.weather.gov/>, or at the following: National Weather Service Boston/Norton, MA 46 Commerce Way Norton, MA 02766 508.622.3280 Website <http://www.weather.gov/boston> | Facebook <http://www.facebook.com/NWSBoston> | Twitter <http://www.twitter.com/NWSBoston>