The 12z Euro AI was a cool outlier, but there was a definite shift cooler in its ensemble. Lower mean, higher spread, and a new camp of members that want to pinch off the ridge offshore instead of instigating a major heatwave. Importantly though, the largest cluster of members still involve a significant heatwave with 850's more than 10C above normal. Duration looks the same as before.
We were due for a stretch of snow duds down here of more than a sloppy overnight inch on grass. Depressing but it's the new normal. But even the mountains are now gettin' the shaft...demoralizing.
The EPS mean actually has a solid cluster of members that look like the deterministic AIFS. The deterministic ECMWF is on the extreme end of the EPS envelope there.
Wouldn’t surprise me to see 00z trend towards a flatter or more pinched ridge that discontinuously retrogrades with more Pacific energy spilling over the top.