I don't know, it would be hard to bet against a shorter term La Nina, at least in Nino 3. The subsurface warmer pool will push a cold wave to the surface in Nino 1.2 and 3 for at least the next month.
government blocked me lol
It's not really possible to have this pattern (+PNA) with the subsurface the way it is, or an anomaly. I say this because the +PNA hasn't broken since last April 2018.
I don't know, rate of decline of arctic ice seemed much more in the late 1990s through 2007. If you run a linear line forward for the last 12 years, this season is below normal in it's decrease.