The reason I say temporarily is because underwater anomalies are still in an El Nino stage. However, these warm waters are not near the surface and are several dozen meters below the surface. As I have been saying for the last week or more, this El Nino is struggling, and this only continues to prove my case that the El Nino is dying off.
I believe that we still are in an El Nino, only because this is the first update that shows no warm SST anomalies. However, if the same scenario is shown next week, the probability of a neutral winter will skyrocket in my eyes.
ENSO monitoring regions are still hovering around positive-neutral temperatures (just below 0.5 degrees above normal), so we know that the El Nino is not completely killed off. However, this is a big step as far as the potential for a neutral winter, possibly hinting at a La Nina into spring or summer.