2015 recorded one of the strongest El Niños. From November it has been slowly weakening with a transition expected to neutral conditions by next summer, although some models predict El Niño to last for much of 2016. Let’s summarize the main facts.
[©2016 WeatherCast] By historical standards to be classified as a complete El Niño episode, the Oceanic Niño Index (ONI) needs to have a positive ONI greater or equal to +0.5C in the Sea Surface Temperature (SST) for a period of at least 5 consecutive months. Continue reading El Niño is expected to weaken but slowly
