The National Oceanic and Atmospheric Administration officially confirmed Thursday that El Niño has formed in the Pacific Ocean, with meteorologists predicting it could develop into one of the strongest such events on record.

NOAA announced there is a 63% chance the weather pattern will intensify to historic levels during late fall and early winter, potentially ranking among the largest El Niño events since records began in 1950. The agency noted that such intensity could rival or exceed the record El Niño that began in 1997, which caused billions of dollars in weather-related damage globally.

El Niño occurs when ocean temperatures warm in the equatorial Pacific, creating far-reaching effects on global weather systems. The phenomenon typically brings increased storm activity and rainfall to some regions while causing drought conditions in others. Climate scientists expect this El Niño to compound existing weather extremes, as it develops against the backdrop of ongoing global temperature increases.

The weather pattern's impacts vary significantly by geographic region. Atlantic hurricane activity often decreases during El Niño years, while Pacific hurricane and typhoon activity typically increases. Parts of western South America frequently experience heavy rainfall and flooding, while Australia and parts of Asia face increased drought and wildfire risks.

In the United States, El Niño conditions generally produce more intense storms with heavier rainfall across southern states during winter months, while the Pacific Northwest tends to experience warmer and drier conditions. Agricultural impacts are mixed, with some crops benefiting from changing precipitation patterns while others face challenges.

Scientists noted unusually strong early indicators for this El Niño's development, including warmer water temperatures rising toward the Pacific's surface. Several climate researchers forecast that 2027 could become the hottest year on record due to the lagging effects of this weather pattern, which typically peaks in late fall or early winter before dissipating the following spring.