I don't think El Nino is over as such. What's happening is that we're developing a weak, maybe reaching moderate, Modoki El Nino, so regions 1 and 2 will cool and the warm waters will be centrally based in regions 3.4 and 4.
http://www.cpc.ncep.noaa.gov/products/CFSv2/imagesInd3/nino12Mon.gif
http://www.cpc.ncep.noaa.gov/products/CFSv2/imagesInd3/nino34Mon.gif
I've been talking about this a lot in my recent El Nino update's, so anybody that's been following my updates won't be especially surprised about what's going on.
Certainly isn't going to be a "mega El Nino" event though, but that's been obvious since the big drop in the SOI back in March was reversed in April and May - To get "mega El Nino's" you really have to see the SOI go through the floor through spring and early summer, then with the ocean and the atmosphere reflecting each other so well the whole thing starts to feed back on itself and that's how you get the 97-98 type events.
With regards to what a Modoki El Nino could mean for winter, many recent El Nino's have been Modoki type's actually. This kind of centrally based El Nino seem's to increase the chance of a cold winter in the US and maybe even for us... Though as ever when it comes to UK winters there are many other things to take into account.
I may blog about all this on my website this evening.
Originally Posted by: Solar Cycles