IMO, anytime you start seeing flip-flops or even pattern change "delays" on ensemble guidance looking medium-to-long term that screams pattern change, especially when some of the run-to-run changes are rather volatile. I guess this ties into the Pacific discussion, but lately we've seen a pattern across Asia and the western Pacific dominated by wave breaking...there are the signals that we could see the jet become a bit more zonal across Asia with jet extension across the northern Pacific...this is what will help better the PAC and increase potential for amplifying troughs across the East.