Flood Watch Issued For LI, Marine Winds Around 30 Knots: Weather

LONG ISLAND, NY — A flood watch is in effect on Long Island, as excessive rainfall and possible showers are predicted on Monday, the National Weather Service said.

Slow-moving showers with possible thunderstorms could produce locally heavy downpours today into Monday evening. Excessive runoffs may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations, with winds around 5 mph after midnight, the service said.

The flood watch goes into effect at 11 a.m. until midnight. Its announcement comes after the service issued a Marine Weather Statement, as Doppler radar indicated strong thunderstorms, capable of producing winds to around 30 knots.

These thunderstorms were located along a line extending from near Great South Bay to 10 nm east of Fire Island Inlet, moving northeast at 10 knots, the service said.

Chances of rain will continue through Wednesday, and will lighten up on Thursday and Friday, the service said.

Here is the full weekly weather forecast on Long Island, according to the National Weather Service:

Monday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Light and variable wind becoming northeast around 6 mph in the morning.

Monday Night: A 50 percent chance of showers and thunderstorms, mainly before 11 p.m. Mostly cloudy, with a low around 68. South wind around 5 mph becoming northwest after midnight.

Tuesday: Partly sunny, with a high near 81. North wind around 6 mph becoming south in the afternoon.

Tuesday Night: A 40 percent chance of showers and thunderstorms after 2 a.m. Mostly cloudy, with a low around 69. South wind around 7 mph.

Wednesday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8 a.m. High near 77. South wind 7 to 11 mph. Chance of precipitation is 80 percent. New rainfall amounts between a half and three quarters of an inch possible.

Wednesday Night: A 50 percent chance of showers before 2 a.m. Mostly cloudy, with a low around 62.

Thursday: Mostly sunny, with a high near 76.

Thursday Night: Partly cloudy, with a low around 59.

Friday: Mostly sunny, with a high near 75.

Friday Night: Partly cloudy, with a low around 61.