The GOES-16 data posted on this page are preliminary, non-operational data and are undergoing testing. Users bear all responsibility for inspecting the data prior to use and for the manner in which the data are utilized.
A loop of GOES-16 visible (0.64 micron) imagery on 19 June 2017 over the northeast:
illustrates the effects of various islands and coastalines. The surface winds are southerly with warm/moist air advecting northwards. Low clouds (and perhaps fog) develop over the ocean as the warm/moist air advects over the relatively cooler ocean surface. These low clouds converge along the coastlines as well as various islands. The islands also act as a barrier to the flow with various convergence / divergence patterns around the islands.