Super El Niño Could End Up Even Stronger Than Scientists Feared

For months, scientists have been watching the tropical Pacific Ocean with growing concern, anticipating the arrival of an intense “Super” El Niño ranked among the strongest events on record. Now it appears this Super El Niño could set a new benchmark for peak intensity, carrying potentially dire consequences for the extreme weather it drives across the globe.

A Rapidly Strengthening Event

Forecasters warn that El Niño is set to intensify quickly in the tropical Pacific over the coming months. By the time it peaks in late fall to early winter, it is expected to reach the upper tier of intensity, placing it among the most powerful such events ever observed.

It’s already being called a Super El Niño colloquially. Only a handful of events have ever reached that level in recent decades, with the most recent occurring in 2015 to 2016. What’s especially striking this time is that some computer models now predict this El Niño could surpass any event dating back to at least 1950. As one atmospheric scientist at Columbia University put it, the forecasts are, depending on the model, close to unprecedented.

What El Niño Actually Is

El Niño is a periodic climate cycle marked by hotter-than-normal ocean temperatures in the equatorial tropical Pacific, along with accompanying shifts in regional weather patterns. Those shifts don’t stay local; they ripple outward with global consequences.

During these events, enormous amounts of heat transfer from the ocean into the atmosphere. This elevates global average temperatures and raises the likelihood of extreme weather worldwide, from flooding in some areas to drought in others, along with heat waves and other damaging effects.

Why This One Looks Worse

Recent model projections have trended toward a more intense peak compared with earlier simulations, signaling an even greater potential for global disruption. Beyond the weather itself, the impacts can extend into agriculture. El Niño has historically depressed rice yields in India and other parts of Asia, which can contribute to food price inflation.

Climate scientists tracking the projections describe a clear shift in expectations. According to one climate scientist closely following the model runs, the consensus is moving toward an even stronger event, with each passing month producing higher estimates. He noted that the odds of a record-strong El Niño this year are now quite large.

The Evidence Is Already Building

While newer model runs don’t guarantee the event will be as intense as depicted, they reveal a consistent trend, and real-world observations are reinforcing that outlook. Over the past month, ocean temperatures in the key monitoring region have been running record warm for this time of year, as hot water sloshes from the western Pacific toward the east, further boosting the developing El Niño.

The Climate Change Wild Card

There’s a major uncertainty layered on top of all this: a planet already overheated by human-caused climate change. Never before has an El Niño of this projected strength emerged while the world was this hot to begin with.

Right now, global sea surface temperatures sit at record highs, and worldwide air temperatures are tracking toward another top-five warmest year. These warm background conditions could potentially modify some of El Niño’s typical impacts, though scientists are still debating exactly how.

Notably, the last El Niño, in 2023 to 2024, did not produce some of the usual weather pattern shifts that scientists call “teleconnections.” But no two El Niños are alike, and that earlier event was weaker than what’s now forecast. Stronger events are generally more likely to influence weather across multiple continents.

Global Officials Sound the Alarm

The World Meteorological Organization (WMO), the United Nations’ weather arm, is urging officials around the world to prepare. The agency is also working to mobilize UN bodies to anticipate extreme events that could require a humanitarian response.

Late last week, the WMO warned that El Niño is projected to intensify rapidly during the July to September period, bringing broad shifts in weather patterns globally. WMO Secretary-General Celeste Saulo said conditions are already underway and forecast to strengthen into a strong event, which will heighten the risk of heat waves on land and marine heat waves across many regions.

For the July through September window, the agency issued temperature and precipitation outlooks that closely align with the typical effects of a strong El Niño. Even so, these impacts generally reach their peak during the Northern Hemisphere’s winter months.

The WMO update did not directly connect El Niño to the record-breaking heat waves that have already struck Europe and North America this spring and summer, but it did point to a strong likelihood of above-average global temperatures through the coming months.

The Bottom Line

The developing Super El Niño is shaping up to be a potentially historic event, with models and ocean observations both pointing toward record-breaking intensity. Combined with an already overheated planet, the stakes are unusually high, raising the risk of heat waves, floods, droughts, and agricultural disruels across multiple continents. As the WMO urges preparation, the coming months will reveal just how powerful this event becomes, and how much of its predicted force translates into real-world impacts worldwide.