What Is El Niño and Why Should We Care?El Niño has made its return. So what exactly is this weather event? NBC News Meteorologist Bill Karins explains. Get more newsLiveonPrintMay 30, 2014, 8:15 PM UTC / Updated Jan. 6, 2016, 7:27 PM UTCBy Bill KarinsBill KarinsBill Karins is a meteorologist for NBC News.
