A coastal flood watch is issued by the National Weather Service of the United States when coastal flooding along the coast of the Atlantic Ocean, Pacific Ocean, Arctic Ocean, or the Gulf of Mexico is possible.
The flooding must be due to water being forced from the nearby body of water onto land, and not from rainfall.
Nor'easters, hurricanes, tropical storms, and thunderstorms can all lead to the issuance of a coastal flood watch.
[1] The following is an example of a coastal flood watch issued by the National Weather Service office in Norton, Massachusetts.
[2] [3]