el nino arrives

After months of straddling the fence, the atmosphere and ocean over the tropical Pacific have finally leaned far enough toward El Niño that forecasters have declared an El Niño advisory. In this week’s ENSO blog, Emily Becker with NOAA’s Climate Prediction Center explains the atmospheric and oceanic conditions that finally—but barely—tipped the scales. This map pair from the blog shows how El Niño has affected U.S. precipitation during the 10 years of the modern instrument record during which El Niño was present […]