Forecasters at NOAA’s Climate Prediction Center now put the odds of a very strong El Niño this autumn at 81 percent, up from 63 percent a month ago. That 18-point jump, published in the center’s monthly ENSO diagnostic discussion on Thursday, 9 July 2026, is the clearest signal yet that the Pacific is heading somewhere the modern record has been only a handful of times.
The agency’s language is unusually direct. El Niño, it wrote, continues and will strengthen through the end of the year, with a 97% chance it will persist through early spring 2027.
An 81 percent probability applies to the October–December window, and the center added that such an event would rank among the largest El Niño events in the historical record going back to 1950.
The ocean hasn’t arrived yet — the models say it will
Read the numbers carefully and a gap opens up. The threshold that earns an event the informal “super” label is roughly 2.0°C above average in the central Pacific, sustained across three consecutive months. The latest weekly Niño-3.4 index — the benchmark forecasters watch — sits at +1.2°C. That is a moderate El Niño, not a monster.
What makes the forecast confident is everything around that headline figure. The far-eastern Niño-1+2 region, hard against the coast of South America, is already running at +2.7°C. The westernmost Niño-4 index is a comparatively mild +0.5°C. That east-heavy tilt matters: a recent downwelling Kelvin wave has deepened the thermocline and pushed warm water toward the eastern Pacific, and the atmosphere has begun to answer, with westerly wind anomalies at low levels, enhanced convection over the central and east-central Pacific, and suppressed convection over Indonesia. Ocean and atmosphere are locking together. That coupling, more than any single temperature reading, is what gives forecasters the nerve to publish a 97 percent number.
The modelling backs it. NOAA’s Geophysical Fluid Dynamics Laboratory published its July run of the SPEAR prediction system on 6 July. Meteorologist Nathaniel Johnson’s summary is worth quoting in full, because ensemble forecasts almost never speak this plainly:
“All 30 ensemble members (dotted purple lines) produce a peak El Niño strength that is at least competitive with the strongest events over the past century, suggesting that a historically strong event is underway.”
Nathaniel Johnson, meteorologist, NOAA Geophysical Fluid Dynamics Laboratory
Thirty out of thirty. And the July forecast came in “notably warmer” than June’s over the following six months — the model is not just confident, it is revising upward. Peak arrives in late autumn or early winter, then a slow bleed through spring.
The Atlantic is already paying for it
Strong El Niños strengthen the subtropical jet stream, and a strong subtropical jet shreds the tall, stacked circulation that Atlantic hurricanes need. The consequence has arrived faster than the peak itself. Colorado State University, which has issued seasonal Atlantic forecasts since 1984, cut its numbers again on Wednesday.
June outlook: 11 named storms · 5 hurricanes · 2 major hurricanes
July revision: 9 named storms · 4 hurricanes · 1 major hurricane
Typical season: 14 named storms · 7 hurricanes · 3 major hurricanes
Odds of a major hurricane striking the U.S. coastline: 17% — down from 24% in June, against a 43% historical average (1880–2020)
One named storm has formed so far: Tropical Storm Arthur, which came ashore at Freeport, Texas, on 17 June. For a coastline that spent the past several seasons bracing, a quiet Atlantic is a reprieve. It is also a reprieve of a specific, conditional kind — the ingredients that suppress hurricanes in one ocean concentrate them in another.
The FOX Forecast Center put the trade-off bluntly: Because El Niño concentrates its deepest pool of warm water and lowest wind shear across the central and eastern Pacific, it transforms that basin into a hyper-fueled engine for major hurricanes and monster typhoons.
Hawaii, Mexico’s Pacific coast and the western Pacific typhoon belt inherit the risk the Gulf sheds.
Why “very strong” is a different animal
Forecasters are careful, and the Climate Prediction Center included a caution that tends to get stripped out of the coverage: even the strongest El Niño events, it noted, do not deliver the textbook impact everywhere. What a strong event does is tilt the odds — harder, and across more of the globe at once.
That is the real reason the 81 percent number carries weight beyond meteorology. Very strong El Niños reorganise rainfall across the tropics simultaneously: drought risk climbs in Indonesia, Australia and southern Africa; the Horn of Africa and the southern United States turn wetter; the Indian monsoon comes under pressure. Agriculture ministries and commodity desks read these advisories the way markets read a central bank. When NOAA first confirmed the event in June, the modelling already pointed toward something historic; the case for multi-trillion-dollar global losses from a strong event rests on exactly this simultaneity. The unease is sufficiently broad that researchers have begun modelling whether marine cloud brightening could blunt the peak — a measure of how few conventional options exist once the Pacific has committed.
There is a version of this story where the ensembles overshoot. Forecasts issued in July, before the boreal-spring predictability barrier is safely astern, have a long record of humbling the people who make them. But the barrier is behind us. The subsurface heat is loaded, the winds have turned, and thirty independent model realisations disagree about nothing that matters.
The Climate Prediction Center issues its next diagnostic discussion on 13 August. Between now and then, the useful question is not whether this El Niño becomes very strong. It is what “very strong” means when it lands on an ocean already warmer than any generation of forecasters has previously calibrated against — and whether the analogues of 1982, 1997 and 2015 still tell us anything at all.
