A boat sits atop the sand at Cedar Beach in...

A boat sits atop the sand at Cedar Beach in Mount Sinai on Sunday.

You should probably wrap up your outdoors weekend fun pretty soon.

A regional flood watch is in effect from Sunday afternoon through Monday night, with the possibility of multiple rounds of heavy rain and thunderstorms that could lead to flash flooding and some gusty winds, according to the National Weather Service.

The rainfall is going to start this evening on Long Island.

It will likely be heaviest in northeastern New Jersey and the Lower Hudson Valley, but could also be excessive on Long Island, especially on Monday.

The test represents the latest effort to combat Lyme, the most common tick-borne disease in the United States. NewsdayTV's Ken Buffa spoke with local experts on what you can do to prevent this disease. Credit: Newsday Studios; File Footage

'You have to check your entire body' The test represents the latest effort to combat Lyme, the most common tick-borne disease in the United States. NewsdayTV's Ken Buffa spoke with local experts on what you can do to prevent this disease.

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