Wow, while I'm away in the Seychelles we got a big boost up without an El Nino.
I was alerted to this by a big diversion from the normal ice build-up.
That's quite a jag off the track. I have the benefit of closing the cottage in relative warmth. I'd like to see the forcing function for this, but there might have been a big surge of warm water.
ps. I'm back home and looking, but there is no obvious cause for this. I'll just enjoy it while I can.