Overview
- NOAA declared the episode a 'Super El Niño' on Thursday, citing very large ocean anomalies including Niño 3.4 near +2.5°C and coastal spots above +4°C that exceed most prior strong events.
- Peru's ENFEN says the coastal El Niño will remain extraordinary through February 2027 and could have effects that linger into mid‑2027, with higher river flows and greater flood and erosion risk on the northern coast.
- Observations already show teleconnections: Meteocat linked a Caribbean‑to‑Iberia atmospheric river that brought heavy moisture to Catalonia to the stronger subtropical jet tied to the Super El Niño.
- Seasonal models from ECMWF and regional agencies signal elevated chances of wetter winters in the southern United States and heavier rains in parts of Argentina, but precise local timing and intensity remain probabilistic.
- Authorities and scientists urge monitoring and preparedness for water, fisheries and infrastructure impacts, with NOAA and ENFEN scheduled to issue further diagnostic updates on December 10 and November 30 respectively.