Here in Trumbull, I didn't use a snow board. I would say the greatest depth at any time during the storm was 11"*. So with 6 hour measurements, given the the density of the snow, maybe 15"?
20" is hard to believe, unless the airport was stuck in this morning's band for a couple of hours more than me. EastonWx is a very reliable measurer a couple of miles from me...has he checked in?
*I really believe this is how storms should be measured. This is why being at ground zero for the Cleveland Super Bomb was so amazing. The airport at SBN measured 41" on the ground, which included 6" of crud that was already in place.