La Niña Emerges
Sea-surface temperatures across the tropical Pacific have cooled to the point in recent weeks that weather agencies have officially recognized the phenomenon as a new La Niña. The opposite of an El Niño, La Niña also develops about every three to five years with its own set of weather disruptions, including the chance of more and stronger tropical cyclones in the Atlantic basin.
It also can bring wetter weather to northern Australia, Indonesia and the Philippines, along with drier weather for western South America and cooler-than-normal temperatures for western Africa. NOAA predicts the new La Niña has a 75% chance of persisting into next year.