A fast-forming Super El Niño could suppress Atlantic hurricanes while favoring tropical activity in the Eastern Pacific and wetter conditions in the U.S. South.
A Super El Niño is ramping up faster than expected, and meteorologists say it could reshape this hurricane season—quieting the Atlantic while pushing more storm energy toward the Pacific.
New ocean data from the central Pacific suggests the shift toward an El Niño-style climate pattern is accelerating.. The warming is reaching the key benchmark used to qualify El Niño conditions. a development that the report says could suppress the upcoming Atlantic hurricane season.. At the same time. it’s also being linked to a wetter weather pattern for the Southern Tier of the U.S.. heading into winter.
The brewing “Super El Niño” is tied to sea-surface warming in the central Pacific.. Water temperatures there have already begun to rise to the 0.5 degrees Celsius threshold—often used as a qualification point for El Niño—while the full development is expected sometime this summer.. The report also highlighted extremely high confidence that a strong event will form this year.
In the Atlantic basin, El Niño typically influences hurricane activity through atmospheric changes that make storm development harder.. One of the most important mechanisms is increased upper-level wind shear. which can disrupt the organization tropical systems need to intensify.. When those conditions become more hostile, the overall number of tropical systems often declines.
Meanwhile, the Eastern Pacific basin is operating on a different schedule and is expected to respond more strongly to El Niño. The report points out that the Eastern Pacific hurricane season begins this Friday, and El Niño is forecast to increase tropical activity there.
El Niño is part of the El Niño-Southern Oscillation (ENSO) cycle, which includes multiple phases. The report described ENSO as a climate rhythm driven by natural temperature swings in the central Pacific that can alter atmospheric circulation and ripple outward into regional weather patterns.
Within ENSO, El Niño refers to warmer-than-average ocean temperatures across the equatorial Pacific.. By contrast. La Niña is associated with cooler-than-average conditions. while ENSO neutral is the baseline state when temperatures are closer to average.. These distinctions matter because each phase tends to nudge the atmosphere in different directions. changing where storms can grow and where they struggle.
Forecast models discussed in the report suggest this summer’s El Niño may not just be strong. but “Super.” In this framing. a Super El Niño is declared when central Pacific water temperatures reach at least 2 degrees Celsius. and the models also indicate it could rank among the strongest events ever observed.
The report also stressed that the most dramatic changes are not only happening at the surface. It noted that major shifts are occurring 100 to 200 meters below the surface, where the ocean’s stored heat can influence how quickly the atmosphere responds and how long the pattern may persist.
A key driver. according to the report. is a large pool of warm water building in the Western Pacific that is beginning to move eastward—described as “sloshing” east.. Fueled by winds from the west and other physical factors. that warm-water reservoir is expected to arrive in the El Niño zone sometime this summer. further raising central Pacific temperatures.
Looking ahead. the report said there is a very high probability that El Niño conditions will persist through the end of 2026.. As the event strengthens, it is expected to bend the Pacific jet stream and shift it southward.. Because the jet stream acts like an atmospheric conveyor belt for storms. the report links that shift to a tendency for wetter-than-average patterns for California and the South in the latter half of the year and into winter.
On where tropical storms can form, the report laid out a nuanced picture for the Gulf and the Southeast.. While a strong El Niño is expected to effectively shut down hurricane formation in the open Atlantic waters this year. it may still be possible for tropical activity to emerge in the northern Gulf and near the Southeast coast.. In that regard. a separate long-range European forecast model was cited as suggesting near-normal tropical activity close to the U.S.. mainland.
The warning, repeated by both the report’s hurricane specialist and the forecast center, is that forecast patterns do not eliminate risk. Even in a season expected to be quieter in one basin, “it only takes one storm” to create major impacts for communities.
The report also anchored the discussion to the formal hurricane season calendar: the Atlantic hurricane season runs from June 1 through Nov. 30. During that window, the suppression signal for open Atlantic storm formation is central to the forecast.
Finally, the report said the Eastern Pacific may be the place to watch more closely. That season begins this Friday and, with sea-surface temperatures already 2 to 3 degrees above average, the environment is expected to become more conducive for tropical development under El Niño.
Separately, the report previewed new AI tools to be used this year for tracking cyclones, describing them as part of how modern systems will help monitor storms and improve situational awareness as conditions evolve through the season.
Super El Niño Atlantic hurricane season Eastern Pacific hurricanes ENSO cycle jet stream shift NOAA Pacific temperatures