Winter 2026/2027 Forecast: Super El Niño and Polar Vortex Signals
The upcoming Winter 2026/2027 is expected to be heavily influenced by a rare Super El Niño event, which is already showing signs of record-breaking strength. This phenomenon is characterized by significant ocean temperature anomalies, with values exceeding 6°C (11°F) above normal in the tropical Pacific. The Super El Niño is projected to reshape global weather patterns, including a split-flow jet stream across North America and Europe. Additionally, early signals of Polar Vortex weakening have emerged, suggesting potential disruptions in mid-to-late winter. These disruptions could lead to colder air outbreaks in mid-latitude regions, although specific impacts remain uncertain. Seasonal forecasts from ECMWF and NMME models indicate amplified pressure anomalies, warmer conditions in northern regions, and increased precipitation in southern areas of the United States and Europe. The atmospheric setup is expected to intensify as winter progresses, with the strongest impacts likely in January and February. (Sou... 
