tl;dr: A rapidly intensifying Super El Niño is developing in the tropical Pacific, driven by record westerly wind anomalies and a powerful subsurface Kelvin Wave, with each successive ECMWF and NMME forecast pushing peak strength into historic territory (potentially exceeding +3°C anomaly). Winter 2026/2027 forecasts show a classic amplified El Niño pattern over North America: warmer/drier north, active southern jet stream bringing cooler temperatures and above-normal snowfall to the central and eastern US, with a possible colder late-winter shift. Europe is expected to see a milder, wetter winter driven by a strong Atlantic westerly flow.