Super El Niño Forecast Winter 2026/27
A strong Super El Niño is shaping Winter 2026/27, with models predicting record-strength anomalies that will drive a split-flow pattern across North America and Europe.
Winter 2026/27 is already being defined by a powerful Super El Niño. Forecasts show the event will peak in November-December, with ocean surface temperatures exceeding 6 °C above normal over a wide area. The anomaly is already above the +2 °C threshold required for a Super El Niño and may surpass +3 °C, placing it among the strongest on record.
Super El Niño 2026: Ocean Heat Builds
The latest NOAA-CRW data reveal sustained warm anomalies in the tropical Pacific. A subsurface Kelvin wave has developed a core temperature anomaly over 9 °C above normal in the top 250 m. This downwelling wave is the engine that keeps the El Niño strong into winter. In the western Pacific, a rising cold anomaly below 50 m indicates the classic tilting of the thermocline, signalling an extreme event rather than an early end.
The surface signature is just the visible part of a deep oceanic heat source that feeds the atmosphere. Seasonal models adjust each month as new data arrive, and the most recent ECMWF runs show a stronger peak than earlier forecasts. The NCEP CFSv2 model also projects the Kelvin wave fully released, confirming the extreme strength.
For those tracking the numbers, the latest stats show the anomaly trajectory and the projected peak. The forecast trend is clear: each new run pushes the event into record-strength territory.
Forecast Models Push Strength
Seasonal forecast systems combine ocean and atmospheric simulations. Because they cannot predict individual wind bursts until they occur, each monthly update must incorporate fresh observations. The result is a steady rise in the projected peak strength.
The most recent ECMWF forecasts, released in early February, illustrate this trend. The model shows a significant Super El Niño for November-December, with basin-wide ENSO strength that could rank among the strongest ever recorded. The NCEP CFSv2 run confirms the fully released Kelvin wave and projects an anomaly exceeding +3 °C.
These models suggest a split-flow pattern: a deep low-pressure trough over the North Pacific, a strong ridge over Canada, and a low-pressure zone over the southern United States. The jet stream will split, keeping the coldest air away from the northern parts while driving an active storm track across the south.
The implications for snowfall and ski conditions are significant. Our team has updated the fixtures to reflect the projected snow totals for major ski resorts. The forecast also highlights the potential for severe winter weather across the United States and Canada.
Historical Winter Impacts
Past Super El Niño winters have shown a clear pattern of pressure, temperature, and snowfall anomalies. A deep low over the North Pacific forces a high-pressure ridge over Canada and the northern United States, while a low-pressure highway runs through the southern U.S. and into the Atlantic.
Temperature analyses from previous events show above-normal warmth over the Upper Midwest, Great Lakes, and southern Canada, with cooler conditions in the southern U.S. due to persistent cloud cover and precipitation. Europe experiences a milder westerly flow, leading to above-average temperatures across the continent.
The 2026/27 forecast, based on the strongest Super El Niño on record, will likely follow a similar pattern. The split-flow jet stream and pressure train will shape the winter across North America and Europe, creating a dramatic divide in weather conditions.
For more detailed regional outlooks, see the updated squad of experts who are monitoring the evolving models. The source of this analysis is Severe-Weather.eu, which provides in-depth seasonal forecasts and visual guides to help explain the upcoming season.
