Predicting El Niño or La Niña

There's an interesting post on the climate.gov ENSO blog asking "How good have models been at predicting ENSO in the 21st century?"

It starts with an intro to ENSO:

"La Niña and El Niño make up the El Niño/Southern Oscillation, or ENSO. La Niña is characterized by cooler-than-average sea surface temperatures across the central and eastern tropical Pacific Ocean. El Niño is the opposite phase, with warmer-than-average water present across the tropical Pacific Ocean. These changes in sea surface temperature…