Forecasters estimate the chance that El Niño will continue through the end of 2015 at greater than 80%. What's behind this confident forecast?
Why is it so difficult to make a good ENSO prediction during the Northern Hemisphere spring?
ENSO is a complicated thing to model. What are the challenges, and how can we overcome them?
El Nino conditions strengthened in March. Where do forecasters think we're going from here?
Guest blogger Mike McPhaden describes what it was like making El Niño forecasts in the mid-1970s, compared with making them today.