Still some uncertainty re snow chances from late Sat night into
Sunday as low pressure passes well to the SE and the area falls
underneath or very close to upper jet and mid level
frontogenetic forcing. ECMWF, after trending farther south for a
couple of cycles, has come back a little NW, while other global
models are farther south/east. Forecast splits the difference,
with chance snow for the entire area during this time frame.
Liquid equivalent QPF forecast by the operational models is
mostly less than 1/10 inch throughout per GFS/Canadian, and
about 1/10 inch from NYC east per ECMWF and less NW. Meanwhile,
ensemble means suggest a little more QPF, with about 1/10 inch
from NYC north/west and 1-2 tenths for Long Island. SLR should
be fairly high though in the cold air mass, running between
12-15:1, so a 1-2 inch snowfall still seems quite possible, with
the higher amts to the east and south of NYC, possibly also in
the higher elevations inland.