Flash Flood Watch Issued For Long Island

The National Weather Service has issued flash flood watches for Long Island. They will be in effect in Nassau County from 2 a.m. to 2 p.m. Saturday and 2 a.m. to 8 p.m. Saturday in Suffolk County.

A slow moving frontal system will bring heavy rain to the island early Saturday and it's likely to continue through the afternoon. There's also a chance of thunderstorms, mainly during the morning hours Saturday.

Total rainfall amounts will be in the 1.5 to 2-inch range with locally higher amounts possible, the NWS says. Excessive runoff will be possible, which would lead to flooding of urban and poor drainage areas.

A chance of showers will also loom over Easter Sunday, but any rain that does fall isn't expected to be heavy.

The full forecast:

Thursday Night- Mostly cloudy, with a temperature rising to around 56 by 1am. Southwest wind 13 to 18 mph.

Friday- Patchy drizzle with a chance of showers before 4pm, then a chance of showers after 4pm. Patchy fog before 4pm. Otherwise, mostly cloudy, with a high near 64. Breezy, with a south wind 16 to 21 mph. Chance of precipitation is 40%.

Friday Night- A chance of showers, then showers and possibly a thunderstorm after 1am. Some of the storms could produce gusty winds and heavy rain. Patchy fog between 7pm and 3am. Low around 61. South wind around 18 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Saturday- Showers and possibly a thunderstorm. Some of the storms could produce gusty winds and heavy rain. High near 63. Breezy, with a south wind 13 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

Saturday Night- Showers likely, mainly before midnight. Cloudy, with a low around 50. South wind 7 to 14 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Sunday- A 30 percent chance of showers. Mostly cloudy, with a high near 62.

Sunday Night- A 40 percent chance of showers. Mostly cloudy, with a low around 49.

Monday- Scattered showers. Partly sunny, with a high near 64. Chance of precipitation is 50%.