The warming El Nino weather phenomenon, which pushed global temperatures to record highs the last time around, is expected back in the middle of this year, the U.N. said Friday. The United Nations' weather and climate agency said El Nino conditions were likely as early as the May to July three-month window. The World Meteorological Organization (WMO), meanwhile, said early signs indicated a strong event. El Nino is a naturally-occurring climate phenomenon that warms surface temperatures in the central and eastern equatorial Pacific Ocean. It brings changes in winds, pressure and rainfall patterns. Conditions oscillate between El Nino and its opposite, La Nina, with neutral conditions in between. The last El Nino contributed to making 2023 the second-hottest year on record and 2024 the hottest ever. "After a period of neutral conditions at the start of the year ...…