At first glance we look at the prospects for the next 2 days and it seems rather obvious. There are 2 systems playing through. The first one will come through tonight with mix precipitation along the coast or just plain rain depending on where you are. For areas inland of the coast there will be some wet snow that will accumulate a coating to an inch or so. There might be a little bit more in elevated areas. Liquid precipitation amounts being forecast are in the a tenth to 2 tenths of an inch of liquid. This is not going to be any big deal. Some slick spots could develop in a few areas where temperatures might be close to freezing like in Northwest New Jersey and inland areas of the Hudson Valley and for Connecticut north of route 15. Temperatures are marginal at best but it is cold aloft which would support some wet snow.
We look at the 850 mb level or about 5000 feet to often times determine rain versus snow. The Nam model as well as the other weather models have it cold enough. The light blue would indicate where temperatures at that level are below 32. The darker blues are colder. Intensity of precipitation would argue for a colder atmosphere if it falls heavy enough to cool the bottom part of the atmosphere. The best chances for this will be inland...READ MORE AT http://www.meteorologistjoecioffi.com/index.php/2016/12/04/snow-monday-morning-later-tuesday/