Forecasters anticipate a significant weather event this summer, warning that a “Super El Niño” may drive global temperatures to record highs. The National Oceanic and Atmospheric Administration (NOAA) Climate Prediction Center recently reported a 62% likelihood of El Niño conditions occurring between June and August.
Understanding El Niño
El Niño represents the warm phase of the El Niño-Southern Oscillation (ENSO) cycle, characterized by temperature fluctuations in the tropical Pacific Ocean. This phenomenon typically causes warmer waters to accumulate in the eastern equatorial Pacific, which shifts the jet stream southward. As a result, the northern United States may experience warmer and drier conditions, while regions along the Gulf Coast and southeastern U.S. face increased flooding risks.
Current Climate Conditions
At present, the tropical Pacific is undergoing La Niña, the cooling phase of ENSO, where temperatures fall below the long-term average by at least 0.9 degrees Fahrenheit (0.5 degrees Celsius). Experts predict that La Niña will end soon as sea temperatures begin to rise. If these temperatures consistently exceed 0.9 degrees Fahrenheit above average, El Niño conditions will be confirmed.
Potential for a Super El Niño
Should El Niño develop as forecasted, it may escalate into a “Super El Niño,” defined by sea surface temperatures exceeding 3.6 degrees Fahrenheit (2 degrees Celsius) above average. Meteorologist Paul Pastelok of AccuWeather notes that while the intensity of the approaching phenomenon remains uncertain, a moderate to strong El Niño is possible this fall and winter.
- 15% chance of super El Niño by November.
- 1-in-3 chance of a strong El Niño from October to December, though strength predictions are uncertain.
Impact on Weather Patterns
El Niño tends to increase hurricane activity in the central and eastern Pacific while decreasing it in the Atlantic. This generally results in a less-active hurricane season. The ENSO cycle alternates between warm El Niño and cold La Niña phases every two to seven years.
Future Temperature Predictions
Recent El Niño activities contributed to record-breaking heat in 2023 and 2024, with 2024 currently projected as the hottest year on record. Although the return of El Niño could escalate global temperatures in 2026, experts believe it will not exceed the heat experienced in 2024 due to the preceding La Niña conditions.
Climate scientist Zeke Hausfather has suggested that if El Niño returns in 2026, the year could see increased temperatures, with 2027 likely to set new records. Meanwhile, various factors continue to influence global weather patterns, emphasizing that climate change will persist regardless of ENSO’s influence.
