The National Weather Service declared in early June of this year that El Niño has emerged over the tropical Pacific Ocean, and there will be a 56% chance that it will develop into a strong El Niño condition in the late fall of 2023 through spring of 2024. In early July, the World Meteorological Organization (WMO) also declared the onset of El Niño conditions. The warmer-than-average ocean temperatures of El Niño, together with the global warming conditions have led to the record-breaking global mean temperature observed in July 2023 and numerous other all-time high temperature records in cities across the globe.
Authors Erik Smith, et al.