Up to 9 inches of snow is possible per the 18z NAM, but the NAM has been known to over-estimate snowfall amounts. Here's what the models think, all engraved on graphs.
The SREF has never been too adventurous with this snowstorm, so I would bet on the models above the model average. But we will have to see, as every ensemble has their right to their own forecasts.
The models are showing a range from 1-5 inches. This is not the accumulation, but rather accumulation with compaction- that is, snowfall compressed on the ground after all is set and done. Here's the snowfall without compression- what we classify as the actual accumulation.