The main questions are:

1. What do they mean by that formula that seems to involve a running average of running averages?

1. What rules are they using to predict an El Niño? They describe some rules, but there are some subtle issues that arise when applying these rules; in [Part 6]( Steve Wenner tried 4 ways to disambiguate the rules and couldn't match their predictions with any of these.

I'm not sure collaborating with them will work, but it also seems courteous to let them know about our blog articles instead of just letting them bump into them (which they may already have done).