We do not have a strong la nina...not sure where that is coming from. MEI is high, which means this particular cold ENSO event is well coupled with the atmosphere, but the ONI is NOT strong...its borderline weak- moderate at the moment.
Yea, modoki la nina, as with el nino, is a different ballgame and applying stereotypical ENSO climo in that case is often a fool's errand due to disparate convective forcing schemes. Completely buy more of a modoki la nina this season, which likely means a more wintery December and milder mid winter season in the east.
Beginning next spring into the early summer, I expect the strongest positive anomalies to shift west and be joined by some other positive anomalies trending southward from the N PAC, as the la nina decays, which will segue into a rather healthy modoki el nino next year...probably the most robust since 2009-2010, and 2002-2003 before that.