Yeah, that 4-6-month SOI was only matched by 2011 (apr 23.9), which was the Dec 2010 I keep comparing too, as a significant anomaly correlation to this last Winter. Then 1994 (reverse)
1994 4 -19.9
93,92,91 were all <-10 .. so we are reverse-early 1990s. Wierd because that was a 5-year subsurface El Nino, but surface was Neutral. we are + in the subsurface now, which does not match. Showdown I guess lol.