A rapidly intensifying Nor'easter will bring heavy rain to most areas in the Northeast, while others will see rain changing over to snow! In fact, the National Weather Service has already issued a variety of winter weather advisories, watches and warnings for portions of New York. Matt Noyes posted a photo earlier today from Philadelphia of the increasing clouds there...associated with the storm system that will bring the rain and snow to the Northeast.
The weather map to the right is the predicted surface analysis and precipitation for Wednesday morning. If you enlarge it, you'll notice that by that point the center of the storm will be located in Canada, but cold air on the back side of the storm will be draining into the rest of the Northeast. As a result, any lingering rain showers Tuesday night/early Wednesday would likely changeover to snow in some of the higher elevations of Northern and Western New England, and snow showers would continue in the Adirondacks in New York, where several inches of accumulation are possible when the storm is over. At this time, it looks like snow accumulations in the higher elevations of Northern and Western New England (White Mountains, Green Mountains, Berkshires, Monadnocks) will generally be in between a coating and 2" or 3" of slushy snow. The Berkshires and Monadnocks will likely fall on the low end of that range, and conversely amounts in the Whites and Green Mountains will probably be on the higher end of that range. Elsewhere throughout the rest of New England - the precipitation will fall mainly in the form of rain, but a few wet snowflakes mixing in with the rain can't be ruled out outside of the I-95 cooridor.
Remember that you can get the latest weather information right here on National Weather Online - the latest radar, watches/warnings, forecasts, etc. for your area can be accessed to the right of the radar window on the Northeast page of this website.