El Nino Is Doing It Again: Stormy West, Balmy East
El Nino is back and appears to be showing its hand in both the disastrous rainstorms in California and the mild winter the Northeast has experienced so far. Named for the Christ child because it usually appears in the eastern tropical Pacific around Christmas, El Nino is a vast pool of unusually warm equatorial ocean water. The warmth sets off atmospheric events that rearrange air masses and redirect storm tracks around the globe.