2026–27 El Niño Event: What NOAA, NASA, and the WMO Are Predicting

The 2026–27 El Niño event is shaping up to be one of the most closely watched climate phenomena in recent decades. On June 11, 2026, NOAA's Climate Prediction Center issued an El Niño Advisory, confirming that El Niño conditions had formed in the tropical Pacific and were expected to intensify through the Northern Hemisphere winter. This article verifies the key scientific and economic claims circulating about this event, drawing on government agency reports, satellite data, and institutional forecasts.

NOAA's Official Declaration and the 'Very Strong' Forecast

Claim: NOAA declared El Niño's arrival on June 11, 2026, with a 63% chance of a 'very strong' event.

Confirmed. On June 11, 2026, NOAA's Climate Prediction Center issued an El Niño Advisory, confirming El Niño conditions were present in the tropical Pacific . The agency's June 23 ENSO Diagnostic Discussion states there is a 63% chance of a 'very strong' El Niño during November 2026 – January 2027, defined as sea surface temperatures in the Niño 3.4 region exceeding 2.0°C above average . Forecasters noted the event would likely rank among the largest in the historical record going back to 1950 .

NASA's Detection of a Kelvin Wave

Claim: NASA observed a Kelvin wave reaching South America in spring 2026.

Confirmed. NASA's Sentinel-6 Michael Freilich satellite observed a Kelvin wave—a swell of warm water hundreds of miles wide—moving eastward across the equatorial Pacific and arriving off the coast of South America in May 2026 . NASA noted that warm Kelvin waves typically precede or accompany El Niño events, and the June 2026 sea surface height data showed the event continuing to strengthen .

WMO Preparedness Advisory and the 6°C Subsurface Temperature Claim

Claim: The WMO issued a preparedness advisory citing subsurface temperatures 6°C above average.

Partially confirmed—the 6°C figure requires a caveat. The WMO issued multiple advisories in May–June 2026, warning governments to prepare for El Niño's impacts on global temperature and rainfall patterns . The WMO's June Global Seasonal Climate Update indicated a 'rapid development into a strong El Niño event' for July–September 2026 . However, the specific figure of subsurface temperatures 6°C above average did not appear in the top-level WMO advisories retrieved. Independent climate analysts (Climate Impact Company) reported 'immense subsurface heat' in the equatorial Pacific, and a third-party situation report cited the 6°C anomaly . This claim is plausible but could not be directly verified from the primary WMO sources captured in this search.

Expected Impacts on North America

Claim: Southern flood risk, northern drought, and a below-normal Atlantic hurricane season of 8–14 storms.

Confirmed for the hurricane outlook. NOAA's 2026 Atlantic Hurricane Season Outlook, released May 21 and updated June 18, calls for a 55% chance of a below-normal season, with an expected range of 8–14 named storms . The suppressed activity is directly attributed to strong El Niño conditions increasing wind shear over the Atlantic . The southern flood risk and northern drought pattern is consistent with historical El Niño teleconnections for North America, though specific 2026–27 seasonal outlooks for the contiguous U.S. were not fully retrieved in this search.

Unverified Economic Impact Claims

Several high-profile economic warnings could not be verified from the sources retrieved in this search:

Risilience: $342 Billion Crop Losses and 10–50% Commodity Price Shocks — No direct source containing these figures appeared in the search results. These numbers are consistent with Risilience's published modeling capabilities, but the specific claims remain unconfirmed from this search.

J.P. Morgan: Fertilizer-Driven Food Inflation into 2027 — No retrieved source contains this specific warning. It is plausible that J.P. Morgan Research published such a note, but it was not found.

Fitch, Schroders, and Others: Commodity-Driven Inflation into 2027 — These warnings may exist in investment research notes or financial media coverage not captured within the search budget. No direct verification from this search.

Scientific Debate: Does Climate Change Amplify El Niño?

Claim: There is an ongoing scientific debate on whether climate change amplifies El Niño intensity.

Confirmed as an active area of research. This is a well-established question in climate science literature. While the search did not surface a specific 2026 paper on the topic, the rapid intensification observed in 2026—from weak conditions in March–May to potentially very strong by winter—adds real-time data to the discussion about whether anthropogenic warming increases the likelihood of 'super El Niño' events .

Bottom Line

The core scientific claims—NOAA's declaration, the 63% probability of a very strong event, the NASA Kelvin wave detection, the WMO advisory, and the below-normal hurricane outlook—are well-sourced and confirmed. The claim of subsurface temperatures 6°C above average is partially supported by third-party reports but not directly found in top WMO advisories. Several economic loss estimates from Risilience, J.P. Morgan, Fitch, and Schroders could not be directly verified from the sources retrieved and should be treated as unconfirmed until primary sources are located.