To elaborate slightly more on an earlier tweet, tne thing to note here is the Scandinavian high at least in the EPS is undergoing more rapid retrogression towards Greenland in the extended range, which says a lot about the amplitude of the ridge in the model even when you consider how spread increases w/ time in an ensemble suite. Larger/stronger Rossby Waves undergo more planetary vorticity advection, thus retrograde more vehemently while at the same time, the background flow might be turning more easterly (if the amplitude of the high doesn't change) which is also more favorable for blocking. Point being, in either case, although the look on the EPS seems fantastic in the longer range (& rightfully so), what I'm arguing is that we're actually trending towards an even better pattern!
View attachment 7381