As with just about every storm threat this year, we need the southern vort max to round the base of the trof - we need PVA on the downstream side of the trof to initiate a negative tilt, raise heights downstream sooner, and keep the zone of high baroclinicity closer to the coast instead of offshore. This would enable a SLP center to form in the SE or near the coast instead of offshore. If we have to wait for follow-up northern stream shortwaves to sharpen the trof, the incipient SLP will be too far offshore to have an impact.
We're really missing southern stream involvement. This positively tilted, lagging vortmax crap shown on every model is not going to cut it. I think we had an EC run or two a few days ago and a GFS run a day ago that almost worked. But nothing since has really been close.