JAXA/EORC: El Nino Watch
Although El Nino is not a particular interest of mine JAXA have a new web page which I think is good.
Click the image or follow this link.
The web server might be fairly slow responding if my experience from the UK is representative, no big deal. This might be because a lot of images are rendered and loaded before the page displays.
Other things I have in progress might call on the knowledge of those who follow these regional area index.