You would still get a good sized trough, as the block maxes out at 585dm. Dec 2021 is a pretty good analog if it were further east.

Strictly speaking if the block were further east, heights wouldn't be as low due to less arctic air spilling out over the ocean and bombing out into a massive low. Sometimes, on the other side, the grass is browner.

Nothing until it reorganizes and pivots sliding eastward.

Painful to watch but what can you do

Night Shift 6z GFS@Gradient Keeper This run says PDX only has .20" through 4 PM. That is going to be way off. I'm already at .30" and Radar is beginning to look impressive.