This westerly wind burst occurred later in the El Nino event than the strong ones we saw during the 1997/98 event (mostly in Oct-Dec 1997). It's a perfect example of how each El Nino is different, and how complex the system is. We don't know yet if or how it will slow the decay of El Nino. In a few weeks, we'll have a clearer picture of the effect of the wind burst on ocean heat content.