Astronomical high tides, coupled with a forecast of rain and possible thunderstorms, led to a coastal flood advisory, since lifted, being issued for much of Long Island on Friday, officials said.

The weather service is predicting possible thunderstorms and winds of between 13 and 18 mph with gusts to 28 mph. Rainfall is predicted at three-quarters of an inch to an inch for most of Long Island.

As of late afternoon area airports were experiencing some weather-related arrival delays, an average of 1 hour and 11 minutes at LaGuardia airport and an average of nearly two hours at Newark Liberty Airport, according to the Federal Aviation Administration. Kennedy Airport was not reporting such delays as of shortly after 6 p.m.

There were also scattered departure delays from LaGuardia, Long Island MacArthur, Newark and JFK airports, with the FAA advising travelers to check with their airlines to see if their flights are affected.

The coastal flood advisory expired at 1 p.m. for the South Shore of Nassau County, and at 4 p.m. for western and central Long Island Sound, according to the National Weather Service Any potential flooding was expected to be minor.

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Departure above the astronomical tides was expected to be about 1 foot in most cases.

Vulnerable coastal areas could experience worse flooding if heavier rains coincide with high tides, the weather service said.

Sunny skies are expected to return Saturday.