Long Island Weather: Potent Coastal Storm Approaching

A potent coastal storm will begin lashing Long Island Saturday night. A wind advisory takes effect at 8 p.m. for Nassau County and western Suffolk County. Wind gusts up to 50 mph could blow down limbs, trees and power lines, leading to some outages, the National Weather Service says.

The worst of the storm is expected from about 11 p.m. until 6 a.m. Sunday. A brief tornado on the island remains possible.

There's a high rip current risk at all ocean-facing beaches through Sunday.

The full forecast:

Saturday Night- Showers and possibly a thunderstorm. Some of the storms could produce gusty winds and heavy rain. Low around 69. Windy, with an east wind 18 to 23 mph increasing to 24 to 29 mph after midnight. Winds could gust as high as 39 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Sunday- Showers likely and possibly a thunderstorm before 7am, then a chance of showers. Mostly cloudy, with a high near 82. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

Sunday Night- A chance of showers before 9pm, then a chance of showers and thunderstorms between 9pm and 3am, then showers and possibly a thunderstorm after 3am. Low around 75. South wind around 15 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Monday- Showers and possibly a thunderstorm. High near 82. South wind 14 to 17 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Monday Night- A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. South wind 11 to 15 mph.