| Weather Term | Description / Definition |
| La Niņa | La Niņa, a phase of ENSO, is a periodic cooling of surface ocean waters in the eastern tropical Pacific along with a shift in convection in the western Pacific further west than the climatological average. These conditions affect weather patterns around the world. The preliminary CPC definition of La Niņa is a phenomenon in the equatorial Pacific Ocean characterized by a negative sea surface temperature departure from normal. |