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El Niño 2026 is rapidly intensifying and could become one of the most powerful events in modern records, bringing major changes to weather patterns across the United States and influencing global temperatures, according to the latest outlook from the National Oceanic and Atmospheric Administration.
NOAA now has high confidence that a very strong El Niño will develop during the Northern Hemisphere fall and winter seasons. The agency estimates a 69% chance that the event will exceed the strength of every previous El Niño recorded since 1950 between October and December.
The current event is already ranked as the second strongest on record for this point in the year, trailing only the 1997 El Niño. Michelle L’Heureux, a physical scientist at NOAA’s Climate Prediction Center, said forecasters now have more than a 90% chance of a “very strong” event by the end of 2026.
Historic El Niño 2026 Forecast Raises Powerful Weather Concerns
El Niño is the warm phase of the El Niño-Southern Oscillation, a natural climate cycle linked to warmer-than-average sea surface temperatures across the central and eastern equatorial Pacific Ocean. Its cooler phase is known as La Niña, while neutral conditions occur when temperatures remain near average.
NOAA classifies El Niño events as weak, moderate, strong or very strong. Although terms such as “super” and “extreme” are frequently used online, they are not part of the standardized classifications used by NOAA and the World Meteorological Organization.
The strongest and most consistent effects typically emerge from late autumn through early spring. However, experts caution that no two seasons are identical. Even a historic event does not guarantee that every location will experience the weather traditionally associated with El Niño.
Critical U.S. Weather Changes Expected This Winter
Across the United States, the developing climate pattern could produce notable regional differences:
- Northeast: Warmer conditions are often favored across the northern United States, while coastal and mid-Atlantic areas may see an increased chance of above-average snowfall. Inland locations can trend drier with less snow.
- South: Texas, the Gulf Coast and the Southeast typically face cooler temperatures and wetter conditions. Parts of the south-central Mississippi Valley may instead experience below-average precipitation.
- Midwest: Warmer weather is generally favored from the northern Plains through the Great Lakes. Drier conditions may affect portions of the Ohio Valley and Great Lakes region.
- West: The Northwest often turns warmer, while Southern California and the Southwest can receive more precipitation. Southern Rockies snowfall may increase, while the northern Rockies trend drier.
- Alaska: Warmer and drier winter conditions could reduce snowfall and weaken snowpack. More precipitation may fall as rain, prolonging snow deficits into spring.
- Hawaii: Wetter conditions can occur as El Niño develops, followed by a shift toward drier weather. That transition may raise drought and wildfire concerns.
Forecasters also warn that tropical systems could create indirect effects, including heavier rain and flash-flood threats in the Southwest and additional risks for Hawaii.
Explosive Hurricane Season Contrast Between Oceans
El Niño is expected to remain a major influence during the height of the 2026 hurricane season. In the Atlantic, it often suppresses tropical activity by creating strong upper-level winds that make storm development more difficult.
The eastern Pacific usually sees the opposite effect. More favorable atmospheric conditions can support above-average hurricane activity, although ocean temperatures and other climate factors also influence the number and strength of storms.
NOAA continues to maintain its prediction for a below-normal Atlantic hurricane season. Still, officials emphasize that El Niño is only one part of a complicated forecasting picture, and individual storms can develop despite a generally unfavorable pattern.
Global Heat Records Could Be Challenged Again
The potential impact extends well beyond regional weather. El Niño often contributes to higher global average temperatures because warmer Pacific waters release additional heat into the atmosphere. That influence is now occurring alongside long-term warming driven primarily by human-caused greenhouse gas emissions.
NOAA’s National Centers for Environmental Information estimates that 2026 is virtually certain to rank among the five warmest years ever recorded, with a 99.9% probability. The odds of 2026 becoming the single warmest year remain below 1%, but forecasters expect the risk to rise substantially for 2027.
Global temperature effects often lag behind the beginning and peak of El Niño. As a result, the event’s strongest influence may be felt after the pattern reaches its peak, potentially keeping temperatures elevated into the following year.
“Warmer ocean temperatures associated with El Niño, together with its tendency to favor warmer conditions in many areas, often contribute to warmer than normal global annual temperatures,” said Jon Gottschalck, chief of NOAA’s Operational Prediction Branch.
Frequently Asked Questions About El Niño 2026
What is El Niño 2026?
It is the warm phase of a natural Pacific Ocean climate cycle. The 2026 event is strengthening and could become very strong or historically powerful.
Will El Niño 2026 affect U.S. snowfall?
It may increase snowfall chances in the mid-Atlantic, coastal Northeast, southern Plains and southern Rockies, while reducing snowfall in parts of the northern Plains and northern Rockies.
How could El Niño affect hurricanes?
El Niño commonly suppresses Atlantic hurricane activity but supports more frequent or stronger tropical systems in the eastern Pacific.
Will El Niño 2026 make the planet warmer?
Likely. The event can temporarily raise global temperatures, and its greatest effects may occur in 2027 after the pattern peaks.
