A weak El Niño may develop in September and October and last until the northern hemisphere winter, according to the World Meteorological Organization’s new El Niño/La Niña Update.
The El Niño phenomenon is due to large-scale interactions between the ocean and the atmosphere. It is characterized by unusually warm ocean surface temperatures in the central and eastern tropical Pacific, in contrast to the unusually cool ocean surface temperatures witnessed in the same region during La Niña events. Both El Niño and La Niña have a large influence on weather and climate around the globe. Press release