I think most of the state will fall into the 12″-20″ range tonight and tomorrow. There will be some areas that get just shy of this (probably 9″-11″) but the majority of the state will see blockbuster (12″) snowfall totals.
The National Weather Service is going just bonkers with their snowfall forecast. I think this is on the high side but it gives you an idea of some potential amounts. 20″ totals are possible in some isolated areas but I expect totals in excess of 18″ to be the exception rather than the rule. In general 12″-16″ will be most common.