Both the GFS and Euro are almost identical at 60 hours as the system crashes into CA. They both have the wave. But the GFS brings it across the southwest and ejects stronger...the euro de-amplifies it some...but its still healthy enough ejecting from the mountains...but for whatever reason...and I can't see HUGE differences in the flow around it to easily account, yes I can see how the flow to the northeast is compressing it but that is there on the GFS too and I am not sure that should be impacting the wave as early on as the euro starts to weaken it...the euro weakens and shears the wave out as it comes across and the GFS amplifies it. But its not like we need the euro to conjure up a wave...its there, and its healthy enough to begin with...just needs to amplify it coming across instead of weakening it.