Late tomorrow night into Wednesday.
Models at this point range anywhere from a few inches to 15 inches. You know, normal everyday weather stuff.
This is a very complex system, with multiple moving parts. A watch is definitely the right move attm, if it's still looking bad tomorrow go to warning, if things trend west and warmer then go advisory or something.
Latest Euro, FWIW, crushes LI, particularly central areas, with about 10-15 inches. Latest NAM, on the other hand, is a bit of snow to rain.
Being a meteorologist is a tough job, for sure