Island Climate Update 209 - February 2018
Weak La Niña conditions continued in the tropical Pacific during January 2018. Below average sea surface temperatures (SSTs) remained present in the central and eastern equatorial Pacific Ocean but warmed slightly compared to December 2017.
The NINO1 index (near the coast of Peru), which was the most negative with a value below -1.0°C for December 2017, weakened to -0.52°C during January 2018. The NINO3.4 index is negative at -0.68°C (and therefore in the La Niña category), the NINO3 index is at -