Forecast: Coastal storm arriving with heavy rain, high winds overnight

The National Weather Service warned of "widespread moderate" flooding for the Western Long Island Sound coastline as a quick-moving storm is forecast to bring one to two inches of rain Monday night into Tuesday along with winds gusting up to 55 mph.

The low-pressure system, which will bring snow to upstate New York, was already bringing showers to some parts of the area Monday evening and they will intensify and last through early Tuesday, forecasters said.

Most of the heavy rain will fall between 10 p.m. and 4 a.m., according to a weather service storm briefing Monday evening.

Coastal flooding will most likely occur around high tide late Monday on the western coast of Long Island Sound but there will also be "widespread minor and locally moderate flooding" along the western Great South Bay and Jamaica Bay, the weather service said, with minor coastal flooding for eastern Long Island.

A coastal flood advisory goes into effect Monday at midnight and continues through 4 a.m., according to the National Weather Service.

There is a wind advisory from 8 p.m. to 6 a.m. for most of the area, with sustained winds of 25 mph to 35 mph and gusts up to 55 mph, with possibly higher gusts on the East End. A gale warning for all coastal waters will last from 6 p.m. Thursday to 6 a.m. Tuesday.

The winds could bring down some tree limbs and cause power outages, forecasters said.

The rain could continue into early Tuesday, when temperatures in the mid-50s are predicted alon with sunny skies as the day goes on. Long Islanders are in for a lot of sunshine with clear skies on Wednesday, when temperatures are expected to be in the mid-to-upper 50s.

The remainder of the week will see a mix of clouds and sun, with daytime temperatures in the upper 50s and perhaps into the low 60s. Nighttime temperatures will likely dip into the mid-40s.