” … Over the past year, I’ve received numerous questions regarding the purported re-appearance of the Triple R. Typically, my answer has been that the Ridge had not returned, since according to its original definition in 2013, the anomalous high pressure needed to persist across multi-month averages to technically qualify. That longevity–that incredible persistence over months–was what made the atmospheric feature so remarkable in the first place.
Well, folks, we’ve now reached that point once again: a distinctly positive geopotential height anomaly is now present in 2-3 month averages across the far northeastern Pacific and West Coast, signaling that the Ridiculously Resilient Ridge has indeed returned.
The overall situation, however, is a bit different this year. ... ”