Especially with light fall rates, the residual cold will be slow to erode with any type of replenishing advection process at all...ironically enough we would be better off with heavy precip.
NAM has a myriad of different issues as a model, but I thermals fields in warm advection scenarios is not one of them.....its the one thing that I DO trust it with.
Great event, but not in my top 5...maybe top 10.
My sister and bro-in-law had a summer home in Falmouth at the time...so pissed I didn't chase it there.