Understanding the 'Super El Niño': Forecasts, Definitions, and Impacts
This article analyzes the current state of the El Niño-Southern Oscillation (ENSO), noting an 82% probability of El Niño conditions persisting from May through July 2026. Experts define El Niño by synchronized atmospheric and oceanic conditions, specifically when Niño3.4 sea surface temperatures exceed seasonal averages by at least 0.5°C. To account for global warming effects, NOAA now utilizes the Relative Oceanic Niño Index (RONI). Forecast ensembles predict a strong event with warming of at least 1.5°C, with some models suggesting over 2°C, placing it among significant historical events. The term 'super El Niño,' originally defined by CSIRO researchers as a 3°C departure, is discouraged by professional meteorologists and agencies like NOAA and Australia’s Bureau of Meteorology in favor of standardized categories such as 'weak,' 'moderate,' 'strong,' and 'very strong.' NOAA estimates a 37% chance of a 'very strong' event peaking between November and January. While the event is likely to be powerful, experts caution that intensity does not always correlate linearly with weather impacts, emphasizing the probabilistic nature of ENSO forecasting.
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