One thing I have learned over the past few years: Broadly speaking, Pacific patterns have staying power in this climate regime and LR models often break them down too quickly.
In 2013-14 and 2014-15, I distinctly recall models breaking down those glorious -EPO patterns only to see it pushed back over and over again--which of course redounded to our benefit.
2018-19 and 2019-20 was the flip side of the same phenomenon and we saw raging +EPO patterns remain robust in spite of LR models constantly forecasting their reversal.
In future winters, we should keep this in mind as we try to sift out the head fakes.