Actually given we are in a supercharged high AAM state w/ the extended U200 Pacific jet, the upcoming -dAAMt off such an in-situ state in tandem with onset of E-Hem monsoonal forcing and MJO thru W-Atl - IO sector does not scream prolonged PNW heat at all, and actually now that I think about it, opens the door to another failed attempt to establish +TNH (may retrograde offshore again instead). Previous instances of such setups were not consistently ridgy in the West.
If so, then it may well be that significant heat/ridging does not establish in the West for another month, and another cycle of troughing may be on the doorstep instead.
RDM is actually at -1.5 for the month so far. The last 30 days have been very pleasant. However, May ended up above normal and I’d bet the same for June.