An emerging weather pattern is prompting urgent attention from scientists. The National Oceanic and Atmospheric Administration’s (NOAA) Climate Prediction Center now estimates an 82% chance that El Niño will begin between this month and July. A 96% chance exists that it will continue from December 2026 through February 2027, according to a report released Thursday.
The report notes “still substantial uncertainty about El Niño’s peak strength” this hurricane season. While early forecasts remain cautious, the summer outlook suggests conditions may favor “very strong” El Niño events later in the year. NOAA highlights that the strongest historical El Niño events have been marked by significant ocean-atmosphere coupling throughout the summer.
Global temperatures are already trending upward. NOAA data shows 2026 is on track to be among the warmest years on record, with April 2026 ranking as the fourth-warmest April since global records began in 1850.
What Is El Niño?
El Niño is a complex climate phenomenon defined by the warming of ocean surface temperatures—or above-average sea surface temperatures—in the central and eastern Pacific Ocean.
Under normal conditions, trade winds blow from east to west, pushing warm water toward Asia. During El Niño, these winds weaken or even reverse direction, disrupting global weather patterns. The U.S. Geological Survey (USGS) explains that this shift can trigger extreme meteorological events worldwide.
As warm water shifts eastward from South America toward Asia, it is replaced by colder water rising from the depths—a process called upwelling. This redistribution of heat alters atmospheric circulation, leading to significant climate impacts.
Global Impacts of El Niño
- Increased storm activity and flooding, particularly in the U.S. Southeast and Gulf Coast
- Heightened risk of wildfires and droughts in other regions
- Disruption of marine ecosystems due to shifting water temperatures
The 2015 Super El Niño caused severe drought conditions in the Caribbean, underscoring the pattern’s far-reaching consequences.
Duration and Frequency
El Niño events typically last between nine to 12 months. On average, they occur every two to seven years, though the timing and intensity vary widely.
Origins of the Term
The name “El Niño” comes from Spanish, meaning “little boy.” According to NOAA, the term was first used by South American fishermen in the 1600s to describe unusually warm waters observed off the Pacific coast.
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