I’m going to guess soil temps are factored into those depth maps. 4”/8” here is 40F and I tend to run cool locally. So the model probably isn’t liking snow falling onto 40-50F soils.
Still flashes much of NH to snow around midnight and then pounds through late morning. 2m is pretty cold too…subfreezing here all day.
3k does keep SE NH with off and on IP issues through morning.