NASA has confirmed that a Super El Niño is underway, based on satellite observations of sea surface height across the equatorial Pacific. Data from the Sentinel-6 Michael Freilich satellite reveals elevated sea levels in key areas, which NASA explains is a reliable indicator of warmer-than-normal ocean temperatures. This warming is a hallmark of El Niño.
The National Oceanic and Atmospheric Administration (NOAA) officially declared the El Niño on June 11, but NASA's recent observations provide a complementary confirmation of the climate event. The space agency anticipates that this Super El Niño will lead to significant global consequences, including increased rainfall in the U.S. Southwest and drought conditions in western Pacific nations like Indonesia and Australia. Experts also forecast extreme heat across much of the globe.
NASA's Jet Propulsion Laboratory processed data from the Sentinel-6 Michael Freilich satellite, a joint mission with the European Space Agency (ESA), collected on June 8. The resulting map highlights areas of higher-than-average sea levels in red, normal levels in white, and lower levels in blue. These anomalies are specifically analyzed to isolate signals related to El Niño and other short-term natural phenomena, by removing seasonal cycles and long-term trends.
Earlier this spring, the satellite detected large swells of warm water moving eastward across the Pacific. These phenomena, known as Kelvin waves, are considered a key precursor to El Niño. They occur when the trade winds in the western equatorial Pacific weaken or reverse direction, causing warm water to accumulate in the eastern Pacific. This process deepens the warm surface layer, lowers the thermocline, and suppresses the upwelling of cooler ocean water along the coasts of the Americas.
According to the World Meteorological Organization (WMO), above-normal temperatures are expected globally. The most pronounced warming is anticipated across southern and western North America, Central America, the Caribbean, Europe, North Africa, and large parts of Asia. In the Southern Hemisphere, Northern South America and Southern Africa are projected to experience the most significant warming. Australia's coasts are likely to see warmer conditions, while the northern interior's trend is less certain. Tropical regions, including Equatorial Africa and parts of Southeast Asia, are also expected to be hotter than usual.
El Niño's influence extends to rainfall patterns. The event is typically associated with increased precipitation in areas such as southern South America, the southern United States, and parts of the Horn of Africa and Central Asia. Conversely, drier conditions are often observed in Central America, northern South America, the Caribbean, Australia, and Indonesia.
During the Northern Hemisphere's summer, the warmer ocean waters associated with El Niño can fuel hurricane development in the central and eastern Pacific Ocean. However, this same phenomenon tends to hinder hurricane formation in the Atlantic Basin.
El Niño and La Niña are the warm and cool phases, respectively, of the El Niño-Southern Oscillation (ENSO), a climate pattern that fluctuates irregularly every two to seven years. Each phase influences global temperature, wind, and precipitation patterns by disrupting atmospheric circulation.