The NWS is forecasting light precipitation late this Monday afternoon and evening. Mostly light snow, but if enough warm air gets in along the coast, there could be some rain that would likely freeze on surfaces, so be careful if you need to travel later today. Other parts of the east coast, from DC to Phila, as well.
From the NWS forecast discussion for NYC:
Light precipitation out ahead of the frontal system will work
into areas north and west of NYC this afternoon, and then into
the NYC metro and SW Connecticut mid to late afternoon. Farther
east, across Long Island and southern Connecticut, precipitation
will begin very late this afternoon, probably close to sun down.
Vertical temperatures profiles support primarily a light
snowfall event across most of the area, with the possible
exception of coastal locations which could begin as wintry mix.
A dry sub cloud layer will allow for evaporative cooling with
the boundary layer likely cooling to freezing or below. Right
along the coast, temperatures will be at or just above freezing.
Ground temperatures though will likely be below freezing due to
the prolonged period of subfreezing temperatures. Any rain,
especially on untreated surfaces, may freeze in spots. Amounts
will be extremely light with less than a tenth of an inch of
liquid equivalent. Any snowfall across the region will be under
an inch and any ice accretion will be on the order of a
hundredth or two.
Due to the uncertainty of precipitation type at some locations
and the light nature of the precipitation, preference is to hold
off on issuing a winter weather advisory at this time.
Meanwhile – heavy rain is possible in Southern California. While this is expected in the winter wet season, it will be a problem, especially for areas where wildfires have left the landscape open to erosion.
Minnesota has reached the freezing (melting?) mark of 32 degrees F, but the NWS is looking at the first winter storm of the season for Wednesday night/Thursday.
The medium-range outlook has waves of rain for the NYC area beginning on Thursday, then sharply colder on Saturday.
The system will bring the likelihood of rain Thursday night through
the first half of Saturday. Timing adjustments are anticipated as we
get closer to the event. There may be several waves of rain, first
from warm advection and then as the actual low pressure and cold
front move across. The rain will be accompanied by temperatures
warming into the 50s on Friday and in the upper 40s to near 50 on
Saturday. There is the potential for a widespread 1.5 to 2.5 inches
of rainfall, but this would occur over a long time period. See
hydrology section for more details. Warmer temperatures, snow-melt,
and the rain may lead to areas of fog.
Dry conditions return Saturday night into Sunday as the low moves
away and arctic high pressure builds into the nation from Canada.
Temperatures on Sunday should fall back into the lower 30s.