La Nina 2024 Canada Weather. La niña occurs when water temperatures in the eastern pacific ocean around the equator come in at least 0.5°c colder than normal for about seven consecutive months. The transition from an el niño event to a la niña event is expected.
Neutral conditions remain in place: Ongoing changes in the eastern pacific ocean reveal that el niño is rapidly waning and la niña is roaring in for the summer.