My trusty meteorologist of choice wxrisk.com, a man who abhors the hyperbolic nature with which weather is forecast in this day and age, has this storm at a solid two to three feet. In fact, he has taken to calling Al Roker, NBC, and TWC irresponsible for their confident 7-9 inches after multiple forecast changes on the day of the storm.
He is rarely wrong. The reason, it seems, is that meteorology is based on science.