In our May briefings, we wrote about a storm building in the Pacific. We assigned probabilities, mapped scenarios, and asked ingredient buyers to watch the summer monsoon window. In the three weeks since, the science has moved fast enough that the probabilities are almost beside the point. El Niño is no longer approaching. It has arrived.
The Niño 3.4 index — the main temperature gauge for the equatorial Pacific — crossed the official El Niño threshold of +0.5°C in late May and has since surged to +0.9°C as of the first week of June. The spring predictability barrier, which often blunts early-season forecasts, has broken cleanly. The signal is not just strengthening — it is accelerating at a pace that has surprised even the agencies most closely watching it.
On June 2, the World Meteorological Organization issued a formal public statement urging governments, humanitarian agencies, and climate-sensitive sectors to prepare for El Niño conditions arriving in the coming months. That is not routine language. The WMO reserves that kind of statement for events it believes will be consequential.
What has changed since mid-May
"El Niño conditions are developing and are set to influence global temperature and rainfall patterns, increasing the risk of extreme weather over the coming months."
— WMO, June 2, 2026The shift in the scientific consensus over the past three weeks has been sharper than any comparable period in the lead-up to either the 1997–98 or 2015–16 super events. Three things happened in quick succession that changed the picture:
First, a massive subsurface oceanic Kelvin wave — a pulse of warm water moving east beneath the Pacific surface — rose to the surface faster than models predicted. Subsurface temperature anomalies in this wave have been measured at +8°C at depths of 50 to 250 metres. That is running warmer than the equivalent stage of the 1997–98 event, which at the time was the strongest El Niño in recorded history. Climate scientists at Severe Weather Europe described it as "Code Red for the global atmosphere."
Second, the ECMWF's probability tracker for a super El Niño went from 22% in March, to 80% in April, to 100% in May. That rate of acceleration — the speed at which uncertainty collapsed into near-certainty — is itself unprecedented in the agency's records for this type of event. NOAA's Climate Prediction Center now describes a super El Niño as the "single most likely outcome" for late 2026.
Third, the atmosphere is already responding. The first El Niño impacts were detected in June 2026 forecast models — pressure, temperature, and rainfall pattern changes across North America and Asia that match the signature of past strong events. El Niño has already suppressed Atlantic hurricane formation; the 2026 hurricane season opened June 1 with zero tropical activity, which is the clearest early-season fingerprint of El Niño shear working exactly as expected.
| Indicator | Mid-May reading | June 8 reading | |
|---|---|---|---|
| Niño 3.4 SST anomaly | +0.7°C (approaching threshold) | → | +0.9°C (above threshold — El Niño confirmed) |
| ECMWF super El Niño probability | ~80% | → | 100% |
| IRI El Niño persistence probability | 82% through winter | → | 98% through early 2027 |
| WMO status | Watch (prepare for possible onset) | → | Active alert (prepare for imminent conditions) |
| Atlantic hurricane activity | Below-normal forecast | → | Zero activity on June 1 opening — El Niño shear already visible |
| Peak strength forecast | Super El Niño (~35% probability) | → | Super El Niño "single most likely outcome" — CPC |
The engine underneath — why the Kelvin wave matters
Most El Niño coverage focuses on what happens at the surface — the ocean temperatures, the SST anomalies, the threshold numbers. But the real story of 2026 is happening beneath the surface, and it matters for understanding why this event may be different in scale from what most forecasters were projecting even six weeks ago.
An oceanic Kelvin wave is a massive pulse of warm water that travels east along the equatorial Pacific at depths of 100 to 300 metres. When it reaches the eastern Pacific, it rises to the surface — effectively releasing stored heat that has been building for months. The Kelvin wave driving the 2026 El Niño has subsurface anomalies of +8°C. To put that in context: the 1997–98 event, at the same stage of development, was running cooler.
What makes this significant for agricultural planning is the heat reservoir it represents. Even if the Kelvin wave stops growing today, the warm water already in the system will continue surfacing and releasing heat through late 2026 and into 2027. The supply of energy feeding this event is not fully deployed yet. As Severe Weather Europe's analysis noted, the western tropical Pacific — where the warm supply originates — remains warmer than at the equivalent stage of either the 1997 or 2015 events, suggesting the Kelvin wave "is likely not yet at maximum power."
What the regions are seeing right now
The shift from forecast to confirmed event changes the agricultural picture in ways that matter specifically for procurement. Here is where each major growing region stands as of June 8.
The compounding risk no model fully captures
Climate agencies model El Niño in isolation. The real 2026 supply chain risk is the collision of El Niño with two other concurrent stresses that were not part of the picture in 1997 or 2015.
The first is fertilizer. The Strait of Hormuz situation has kept urea and phosphorus exports constrained, pushing fertilizer prices sharply higher. El Niño drought reduces available irrigation water. When water stress and nutrient stress arrive simultaneously — as they are beginning to do in India, Pakistan, and parts of Southeast Asia — the yield impact is not additive. It multiplies. A crop under heat stress with inadequate water and reduced fertilizer is not a crop that yields 10% below normal. It is a crop that fails.
The second is the starting-point problem. The regions most exposed to El Niño in 2026 are also the regions that have already absorbed significant disruption. Pakistan's 2025 floods left behind damaged canal infrastructure and depleted seed stocks. Southeast Asia's agricultural systems are still carrying the stress footprint of the 2023–24 El Niño, which arrived just two years ago. India's rural farming households absorbed two consecutive years of La Niña-driven excess rainfall before this. They are not walking into a super El Niño from a position of strength.
In our May briefings, we wrote that the period before August — before monsoon data arrives and markets move — was the window for procurement action. That window is now shorter. El Niño has been confirmed. India's monsoon has already started late and below forecast. The Kelvin wave is surfacing. The decisions that buyers could have made in May on relatively stable prices are still available in June, but they will not be available in September.
The next NOAA ENSO diagnostic discussion is due June 11. It will be the first official update since El Niño crossed the threshold, and it is likely to further revise strength estimates upward. Watch for it.
What the update does not change
The broad analytical framework from our three May briefings remains intact. El Niño is bad for Asian rice, bad for Southeast Asian palm oil and coffee, bad for Australian wheat, and broadly positive for Americas-origin corn and soy. None of that has changed — if anything, the June data strengthens each of those directional calls.
What has changed is the confidence interval. In May, a super El Niño was the most probable single outcome but still carried meaningful uncertainty. In June, ECMWF gives it 100% probability and NOAA calls it the single most likely outcome. The range of scenarios has collapsed around the bad end. The question is no longer whether to plan for disruption. It is how much disruption, and which origins are hit hardest in which sequence.
Pakistan's irrigated system still provides a partial buffer that purely rain-fed systems lack. US corn still benefits from the same jet stream dynamics it always has during El Niño. South American soy production is still likely to be supported. These structural facts hold. But they hold against a backdrop that has gotten meaningfully more severe since mid-May — and that will continue to intensify through the Northern Hemisphere autumn as the Kelvin wave fully surfaces and the Pacific reaches its projected peak.