Who honestly believes, that after the typical block breakdown mishandling, that it won't also display the sub 72-hour slow NW walk? So long as the phase holds, I posit that it will. Also, better horizontal resolution absolutely does improve handling of all of these interactions. Take a look at H5 vort on the NAM 12km vs 3km at tau 60 on this run and tell me that the 3km wouldn't be even better. Block is slightly stronger and phase is slightly better.