Flood Watch In Effect For Long Island Wednesday: NWS

LONG ISLAND, NY — All of Long Island is under a flood watch from Tuesday afternoon until Wednesday at 2 p.m., the National Weather Service said.

According to the NWS, the flood watch was issued for western Suffolk County and all of Nassau County and then extended to the eastern portion of Suffolk, too.

Flooding caused by excessive rainfall continues to be possible, the NWS said; excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations.

A slow-moving low pressure system will bring multiple rounds of heavy showers and thunderstorms to the area Tuesday through Wednesday. Average rainfall amounts are expected to be between 2 and 3 inches with localized higher amounts, the NWS said. Peak hourly rainfall rates could be as high as 1.5 to 2.5 inches in the heaviest showers and thunderstorms, the NWS said.

Residents should monitor later forecasts and be alert for possible flood warnings; those living in areas prone to flooding should be prepared to take action should flooding develop, the NWS said.

Here's a look at the weather ahead, according to the NWS:

Wednesday

Showers likely and possibly a thunderstorm before 11 a.m., then a chance of showers between 11 a.m. and 2 p.m., then a chance of showers and thunderstorms after 2 p.m. Mostly cloudy, with a high near 77. Southeast wind around 10 mph. Chance of precipitation is 60 percent. New rainfall amounts between three quarters and one inch possible.

Wednesday night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. South wind around 7 mph becoming west after midnight. Chance of precipitation is 50 percent.

Thursday

A chance of showers, with thunderstorms also possible after 2 p.m. Partly sunny, with a high near 79. Northwest wind 9 to 11 mph. Chance of precipitation is 50 percent.

Thursday night

A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 66.