https://www.aoml.noaa.gov/general/enso_faq/
Found another from 1997! Revised of course, modernized for the brand new year of 2003
Here's an interesting excerpt from the La Niña section: "Scientists have never predicted La Niña and it is difficult to agree on what constitutes La Niña. La Niña events with significant impacts are fairly unusual."
Seems we've come a ways
https://faculty.washington.edu/kessler/occasionally-asked-questions.html
If any of you guys want to learn more about ENSO obscura, I just came across this link-within-a-link. There are so many random weather tidbit html websites like this littered all over the internet, made by college students and pro mets years or even decades ago, still technically accessible by stray links, kept active by the forever running servers on college campuses and government facilities.