What are El Nino and La Nina?

La Nina 2025 To 2026 Weather. La Niña watch issued Weather impacts and climate patterns in 2024/2025 one of the main predictors for a two-year La Nina has been the strength of the El Nino that preceded the La Nina and the amount of heat discharge that followed the El Nino La Niña is the cool phase of the El Niño/Southern Oscillation, or ENSO, a pattern of changes in the tropical Pacific Ocean and the atmospheric circulation over the tropical Pacific that persists for many months.

La Niña watch issued Weather impacts and climate patterns in 2024/2025
La Niña watch issued Weather impacts and climate patterns in 2024/2025 from www.severe-weather.eu

This La Niña is predicted to be weak and relatively short-lived, with the majority of guidance favoring SSTs in the Niño 3.4 region around -0.5 degrees Celsius. Some forecasts were calling for it to begin as early as June 2024, but it held off.

La Niña watch issued Weather impacts and climate patterns in 2024/2025

This La Niña is predicted to be weak and relatively short-lived, with the majority of guidance favoring SSTs in the Niño 3.4 region around -0.5 degrees Celsius. La Niña conditions are expected to persist through February-April (FMA) 2025 with a 59% chance, with a 66% chance of a transition to ENSO-neutral during March-May (MAM) 2025 That means that the expected impacts from La Nina are not going to occur 100% of the time

La Nina El Nino 2025 Brad Jeffries. La Nina increases the odds of certain impacts but there are times the opposite happens This La Niña is predicted to be weak and relatively short-lived, with the majority of guidance favoring SSTs in the Niño 3.4 region around -0.5 degrees Celsius.

La Niña watch issued Weather impacts and climate patterns in 2024/2025. Given current conditions in the Pacific Ocean and the atmosphere above, "weakening La Niña conditions and a trend toward ENSO-neutral" are likely over the coming weeks and months, the CPC said. La Ninas usually result in dry years in California but every once in awhile result in a wet year.