Whalesbook
Super El Niño Formation Likely
The developing El Niño phenomenon in the equatorial Pacific Ocean is drawing attention from forecasters worldwide. Projections from the European Centre for Medium-Range Weather Forecasts (ECMWF) and the U.S. Climate Prediction Center indicate a strong likelihood of it intensifying into a rare 'super El Niño.' This event marks the warmer phase of the El Niño Southern Oscillation (ENSO) and typically weakens Pacific trade winds, allowing warm surface waters to accumulate, leading to higher sea surface temperatures.
Intensifying Forecasts Show Strong Event Ahead
NOAA data from April 2026 shows a 62% chance of El Niño developing between June and August, with probabilities rising to over 70% for July-September and 80% for August-October. Multi-model forecasts confirm a transition to El Niño conditions in summer 2026. The anomaly in equatorial Pacific sea surface temperatures is projected to exceed 2°C above the long-term average, far surpassing the 0.5°C threshold for El Niño declaration. These strong anomalies building since early 2026, following a rapid collapse of La Niña conditions, suggest a potent event.
Global Impacts from Past Super El Niños
The last three 'super El Niño' events in 1982-83, 1997-98, and 2015-16 caused significant global disruptions. The 2015-16 event contributed to record global temperatures and widespread coral bleaching. These powerful El Niños can trigger 'climate regime shifts' (CRS), described as abrupt and persistent transitions in the climate system. Such shifts can lead to long-term droughts in regions like central South Asia and alter soil moisture regimes dramatically. Areas like the central/western North Pacific, southeastern Indian Ocean, and the Gulf of Mexico are identified as hotspots for sea surface temperature regime shifts.