cobb data for NHK from 6z GFS. I'm not an expert on how to use these properly but looks like a front end thump of 8" before flip to sleet and rain, finishing as snow again. The front end snow is assuming ratios of 13:1 it looks like, which I think is too high (I always assume the standard 10:1). Someone can correct me if I'm looking at this wrong.
http://www.meteor.iastate.edu/~ckarsten/cobb/cobb.php?model=gfsm&site=nhk