NWS in NYC put it kindly, noting they have a low confidence forecast, given model variability from run to run within a model and across models. The Euro, in particular took a big jump east with the storm and showing less precip, going from a major snowstorm with up to a foot of snow for most, to a modest snowstorm with up to 6" with the highest amounts more near the coast. First NYC office snowfall map is up, showing a general 3-6" snowfall, wth highest amounts in CT/LI - not enough confidence yet in issuing watches.
They also noted that intensity will be light during most of the daylight hours, with little accumulation, due to indirect sunlight, which is more intense in late March, combined with borderline surface temps in the 33-35F range. Anyone who wants accumulations wants this storm to slow down a little so most of the snow falls after sunset, when accumulations will be much easier.
NWS in Philly talking about similar 3-6" amounts, but their map only goes through 9 pm Sunday, so I didn't bother posting. Still 2.5 days out, so time for some significant model shifts. I'd say we're almost certainly going to get at least an inch or two of snow and are likely to get several inches of snow, but the big snowfalls are looking less likely; no snow is very unlikely.