A winter storm watch is in effect for Saturday into Sunday as a fast-moving system could drop 4 to 6 inches of snow on Long Island, the National Weather Service said.
The snowfall will start Saturday evening and wrap up by daybreak Sunday, the service said.
The heaviest precipitation was forecast from 10 p.m. Saturday to 2 a.m. Sunday, said Jay Engle, weather service meteorologist in Upton. The expectation was for rain to be mixed in with snow as precipitation started, he said.
“Plan on difficult travel conditions and significant reductions in visibility,” with possible isolated power outages, given the weight of the snow, the weather service said in a late Friday afternoon briefing.
Uncertainty remained late Friday as to the system’s ultimate track, location of any heavy bands, as well as how quickly temperatures near the ground will cool down, which paves the way for accumulation, Engle said.
Look for the next major weather service forecast update to be issued about 4 a.m. Saturday.
Saturday was expected to start out with cloudy skies and temperatures heading up to the high 30s at MacArthur Airport, then down to around freezing late that night.
Snow will melt quickly, Engle said, with Sunday’s clouds giving way to sunny skies and temperatures rising to the mid to upper 40s.