Long Island Weather: Snow Total Estimates Rise For Friday, Weekend Storm Could Be Even Worse

A winter weather advisory has been issued for Long Island and snowfall estimates are inching upward for Friday, according to the National Weather Service.

The island will likely see 2-4 inches of snow (2-3 inches in Nassau and western Suffolk; 3-4 inches on the East End), the NWS says.

The winter weather advisory will be in effect from 10 p.m. Thursday until 10 a.m. Friday.

"Snow accumulations will result in hazardous travel conditions late tonight through tomorrow morning," the advisory says.

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The snow should end by mid-morning, but trouble could be brewing for Saturday. As of now, the NWS is calling for a 50 percent chance of snow on Saturday with no accumulation predictions. But here's what the National Weather's Service's New York office wrote in a forecast discussion Thursday evening regarding Saturday:

In contrast to the Thursday-Friday system, the more southwest flow ahead of the system should
draw in a greater combination of Pacific and Gulf moisture that may lead to higher snow totals overall. As usual, there is uncertainty as to how far north the system will reach. 12Z runs have generally
trended farther north, with ensembles suggesting a mean of around 2-5 inches primarily for eastern Long Island and Connecticut, mainly for Saturday and ending overnight. However, the model spread and
subsequent uncertainty still remains high. It is very possible that a winter storm watch may be needed in later forecast updates.

Here's the hour-by-hour forecast for the winter weather advisory period:

Thursday

10 p.m.- 31 degrees, 30 percent chance of snow

11 p.m.- 31 degrees, 42 percent chance of snow

Friday

Midnight- 31 degrees, 65 percent chance of snow

1 a.m.- 30 degrees, 76 percent chance of snow

2 a.m.- 30 degrees, 80 percent chance of snow

3 a.m.- 30 degrees, 82 percent chance of snow

4 a.m.- 29 degrees, 76 percent chance of snow

5 a.m.- 28 degrees, 69 percent chance of snow

6 a.m.- 28 degrees, 56 percent chance of snow

7 a.m.- 28 degrees, 49 percent chance of snow

8 a.m.- 29 degrees, 41 percent chance of snow

9 a.m.- 30 degrees, 24 percent chance of snow

10 a.m.- 32 degrees, 16 percent chance of snow