The latest ENSO wrap up from the Australian Bureau of Meteorology indicates that the El Niño is likely to continue to strengthen, in part because of tropical cyclones.
The 2015 El Niño is likely to strengthen in the coming weeks, largely due to recent tropical cyclone activity. Several tropical cyclones, including a rare July cyclone in the southern hemisphere, have resulted in a strong reversal of trade winds near the equator. This is likely to increase temperatures below the surface of the tropical Pacific Ocean, which may in turn raise sea surface temperatures further in the coming months.
I posted this picture the other day, including the rare (for this time of the year) TC Raquel:
Here's an updated wind map of a region of the western Pacific a bit further north:
The model outlook from BoM shows the likely strengthening of El Nino, with not that much of a spread between models:
Next an animation of sub-surface temperatures in the equatorial Pacific, down to 400m, starting in January 2014 through to June 2015. This year is different to last year. These are from BoM.
Finally, here's an animation of sea surface temperatures across the Pacific, from NOAA images starting in January this year: