Not necessarily every storms different, and every model will behave differently. So if 1 model does really good this storm and maybe several others in a row, you tend to trust that more, that and consistency.
Sadly, the western most tracks placements, hasn't budged from 00z, just a smudge east of bench mark, I believe that the eastern side of guidance spread has increased unfortunately, and that is a little concerning...
That and there using a model blend between the euro/gfs and some nam. 12z nam was showing big snows for everyone just about. To no one seeing anything at 18z and for that reason they do not see that happening and are essentially tossing that run. But that could change.
For example.