The GEFS and EPS have a gorgeous pattern evolution towards the end of their runs... this is thanks to the extension of the Pacific jet in the medium-long range: This jet extension is thanks in part to the +EAMT that is forecasted to develop in the short range: So, overall, it looks like there is some forcing that may be able to shake up this pattern. The jet extension will allow for the anomalous Aleutian ridge to build poleward and kick the mean trough out of the Pac NW and into