UPTON, NY (MorichesDaily) — A powerful Nor’easter is likely to dump several inches of now in the New York area and up to 7 inches in parts of northern Long Island starting Friday.
if the timing is right, two converging low-pressure systems, one to the north and another coming up from the south, could mean a more significant weekend snow for Long Island, as much as 7 inches in some areas, the National Weather Service said Wednesday.
Computer models show the storm starts as snow then changing to rain and then back to snow in the overnight Friday. That Friday night into Saturday period is where we can expect the accumulation — just how much is still the question.
If the southern system moves slowly it would pull in colder air from the north, bringing lower temperatures and larger amounts of snow, the National Weather Service said.
If the southern system moves quickly, warm ocean air will be sucked inland, meaning more of a rain event.
Most of the models are showing around 4-8 inches of snow for Long Island. Other models show the area getting near 2-feet of snow, not changing to rain. It will really depend on where the rain/snow line will be once the storm gets closer.
Forecasters say that milder air is the issue with this storm. The temperature is expected to be near 40 degrees on Friday during the day, and drop as the day progresses.
As it looks now, Friday should start with rain from around New York City to Cape Cod, but that should not stop snow from coming down Friday night.
As the day progresses, the rain/snow mix will likely turn to an all snow event, forecasters say.
As the storm takes shape we will update the forecast and expected accumulation for Long Island & the New York area.