ALERT: Coastal Flood Advisory is in effect from 11pm Sunday to 2 am Monday with tides running about a foot above normal due to the recent New Moon.

Tonight: Mostly cloudy skies across Long Island tonight as a storm system approaches. Rain will overspread the area toward morning. There could be some areas of dense fog. For coastal residence, a Coastal Flood Advisory is in effect from 11pm Sunday to 2 am Monday with tides running about a foot above normal due to the recent New Moon.

Sunday: Showers move in during the morning as a cold front passes through. Rain will be light to moderate, with minor ponding possible in poor drainage spots. Temperatures will fall through the day, dropping into the 40s by afternoon as colder air moves in.

Monday: Much colder air settles over the area. Expect a mix of clouds and some sun, along with the chance for a few brief pop-up showers in the afternoon.

Tuesday into midweek: The coldest air arrives early Tuesday with below-normal morning temperatures and a widespread freeze. After that, a gradual warming trend begins, with temperatures steadily climbing back above normal by the middle to end of the week.