Update on the storm for tomorrow and the potential storm for late next week:
The storm for tomorrow will be moving northeast off the coast, but it will then pinwheel back closer to the coast of Maine by Tuesday and Wednesday with a lot of snow there (see snow maps below). For Long Island, while the NAM last night was showing rain changing to snow tomorrow night, the new run is showing mostly rain (the HRRR shows mostly rain as well), and the details are in the forecast below.
Regarding the potential storm for next Friday night/ Saturday, once again the Euro stands alone. If you remember, the Euro was initially the only model that was showing this storm for tomorrow coming up the coast. It's a similar situation for late next week as the other models slide the storm offshore before getting to the northeast. However, the Euro brings it up the coast with rain for the coast and snow inland. Don't focus on the exact rain/snow line for now since it will be mostly track-dependent. The ensembles show considerable spread (see 7th image), which is to be expected 7 days out, but some do have a snowstorm for Long Island (see 8th image).
LONG ISLAND FORECAST:
Today (Saturday): Cloudy early and then becoming partly cloudy by late morning and becoming windy in the afternoon with highs in the low 50's. Wind gusts up to 30 mph are possible from the WNW.
Tonight: Increasing clouds late with lows mostly in the upper 20's to low 30's.
Tomorrow (Sunday): Rain developing between around 10 AM and 1 PM from southwest to northeast with highs ranging from the upper 30's in northern Nassau to the low 40's in southeastern Suffolk. Breezy with wind gusts up to 20 mph from the ENE. It could mix with sleet or snow at night on the north shore, but no accumulations are expected.
Monday: Partly cloudy with highs in the low 40's. Wind out of the NNW at 10 to 15 mph.
Tuesday: Partly to mostly cloudy with highs in the low 40's.
Wednesday: Mostly sunny with highs in the low 40's.
Thursday: Mostly sunny with highs in the low 40's.
- 1st and 2nd images: Projected snowfall through 7 AM Thursday from the Euro and Euro ensemble mean
- 3rd image: Projected snowfall through 7 PM Monday only from the National Weather Service
- 4th to 6th images: Simulated future radar from the NAM for 11 AM tomorrow, 5 PM tomorrow, and 1 AM Monday
- 7th image: Projected storm locations from the Euro ensemble members for 1 AM next Saturday
- 8th image: Projected snowfall for Long Island for the next 15 days as a running total from every Euro ensemble member
- 9th image: Projected temperatures for Long Island for the next 10 days from the National Weather Service model blend