El Nino Or La Nina 2024. La niña is the cool phase of the pacific ocean's temperature cycle that affects rainfall, heat waves, and drought patterns around the world. El niño and la niña episodes typically occur every two to seven years, and usually last nine to 12 months.
Most climate models combined with expert judgments suggest. Weak la niña events tend to allow for more snow in the northeast, while snow is more limited during stronger la niñas because warmer temperatures often creep farther up.