at the same time, i think the lack of retrogression on the GFS is due to the fact that it buries everything out west and you don’t have that final wave break
i think the GFS just buries it. doesn’t mean that it’s correct. even if it is correct, it just delays the cold air outbreak for a few days, it wouldn’t be disastrous or anything
definitely a trend to phase the kicker in earlier, leading to a much better PVA axis overhead. i'm inclined to believe the GFS is wrong, but this is worth watching
positive vorticity advection. basically moving vorticity from one place to the other. that kind of signature would encourage a deform band to form. just not sure if it's a legit trend or nonsense. FWIW, the CMC has also been trending in that direction
GEFS is actually steadily trending towards the kicker S/W phasing with the trough and creating its own axis of PVA. this would have pretty big implications for you guys and even down here into LI/LHV/NNJ