Long Island weather: Storm to bring rain, gusty winds, possible flooding

There won’t be any snow but the weather outside will be a bit frightful Friday with rain and windy conditions thanks to a storm moving south of Long Island, the National Weather Service said.

A wind advisory was in effect from 4 a.m. to 6 p.m. Friday for Suffolk County with wind gusts possibly getting up to 50 mph.

“The wind advisory will be for a good portion of Long Island, mainly the eastern portion and the South Shore,” Matthew Wunsch, a meteorologist with the National Weather Service, said Thursday evening. “For most of Long Island we can see gusts of 40 to 50 miles per hour for most of the day.”

Wunsch said a coastal low-pressure system was south of Long Island creating the windy conditions.

“That system to our south is going to develop pretty quickly and brush by to our south, so that wind is a response to the intensifying storm that’s going to be moving by,” he said. “The area is being hit by the rain and wind on the north side of it [the low-pressure system].”

By Friday afternoon’s high tide, there is the potential for flooding — up to half a foot — in the Sound, as well as "isolated moderate coastal" flooding for the Island's southern bays.

Wunsch said coastal flood advisories were in place for the back bays on the South Shore of Nassau County as well as southwestern Suffolk County through Friday evening’s high tide.

The high temperature for the day is expected to be about 47 degrees.

The rain should stop around 6 p.m. Friday, with the day ending with temperatures in the low to middle 30s.

“Everything should be done at that point,” he said. “Skies will be generally clear so that by Saturday morning it should mostly clear.”

Saturday and Sunday will be dry and sunny, with a brisk northwest wind. High temperatures on Saturday are going to be in the low to middle 40s, with temperatures dipping into the middle to upper 20s at night.

There is no snow in the foreseeable future for Long Island, Wunsch said, and it’s too soon for a Christmas Eve forecast.