The details for tomorrow's storm are finally crystallizing, but snow crystals aren't a big part of the equation, unless you happen to be a mile high in the atmosphere. Down at ground level, temperatures are going to be too warm for snow until the storm is pulling away and starting to paste New Jersey, New York and New England with copious snow amounts.
Bottom line: Rain tomorrow afternoon, possibly mixing with and changing to snow (especially north of the metro area) before rapidly ending before midnight. Little or no accumulation is expected. However, if the storm develops more quickly than currently forecast, a burst of moderate to heavy snow cannot be ruled out tomorrow evening. Stay tuned for any alerts, as necessary, tomorrow.