Long Island Snow Total Estimates Inch Up, Timeline Shifts

UPDATE: Long Island Town-By-Town Snow Totals

Snow began to overspread Long Island Saturday morning with the fast-moving system now expected to drop up to 5 inches on parts of the region.

A winter weather advisory is in effect for the entire island with the exception of northern Nassau County until 10 p.m., according to the National Weather Service. A total of 2-4 inches of snow is likely for Suffolk County with the potential for 5 inches on the East End. Nassau is expected to see 2-3 inches of accumulation.

A period of moderate snow is likely during the afternoon into the early evening. Brief snowfall rates of a half-inch to an inch per hour are possible. The snow should taper off from west to east in the evening.

The next chance for snow will come Wednesday night into Thursday. The NWS says forecast models have been wavering on the potential for a significant coastal storm during that period. Stay tuned for updates and sign up for Patch news and weather alerts if you aren't already subscribed.

The full forecast:

Saturday- Snow. High near 25. Wind chill values between 10 and 15. Southwest wind 6 to 8 mph becoming northwest in the afternoon. Chance of precipitation is 100%. Total daytime snow accumulation of 2 to 4 inches possible.

Saturday Night- Snow, mainly before 11pm. Low around 16. Wind chill values between 5 and 10. Northwest wind 10 to 14 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Sunday- Mostly sunny and cold, with a steady temperature around 17. Wind chill values between zero and 5. Northwest wind 15 to 18 mph, with gusts as high as 28 mph.

Sunday Night- Mostly clear, with a low around 8. Wind chill values between -10 and zero. Northwest wind 13 to 15 mph.

New Year's Day- Scattered flurries after 4pm. Sunny and cold, with a high near 17. Northwest wind 15 to 17 mph.

Monday Night- Partly cloudy, with a low around 10.

Tuesday- Mostly sunny, with a high near 21.

Tuesday Night- Mostly clear, with a low around 14.

Wednesday- Mostly sunny, with a high near 29.

Wednesday Night- A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 17.

Thursday- A 30 percent chance of snow. Mostly cloudy, with a high near 28.

Thursday Night- Partly cloudy, with a low around 8.

NWS images