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This El Niño Is Set to Be the Largest on Record by a ‘Mind-Blowing Margin’

NOAA said the Pacific warming pattern has a four in five chance of becoming very strong and lasting until at least April 2027.

  • Researchers said today that the ENSO climate pattern strengthening in the Pacific Ocean is on track to be the largest in at least 150 years, with The NOAA anticipating a "very strong" event by year's end.
  • Historically, the Southern Oscillation swings between hot and cool phases every two to seven years, though this year's event emerged in June as a natural fluctuation in Pacific sea surface temperature and winds.
  • Zeke Hausfather of Berkeley Earth compared 14 climate models, showing the median estimate for peak Pacific sea surface temperature is about 0.8°C higher than the record set in 2015-16, calling the margin "truly, a mind-blowing margin."
  • Justin Mankin of Dartmouth College said the event could cause "$10 trillion in economic losses by 2032," while the pattern threatens to stress ecosystems and oceans, potentially driving declines in carbon uptake.
  • Projections suggest it is "not outside the realm of possibility" that the event could combine with climate change to raise global average temperatures in 2027 as high as 1.7°C above the pre-industrial average.
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Center

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El Comercio broke the news in Lima, Peru on Tuesday, July 21, 2026.
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