Skip Navigation Links 
NOAA logo - Click to go to the NOAA home page National Weather Service   NWS logo - Click to go to the NWS home page
Climate Prediction Center

Climate Diagnostics Bulletin
Climate Diagnostics Bulletin - Home Climate Diagnostics Bulletin - Forecast Climate Diagnostics Bulletin - Extratropics


  Tropical Highlights

  Table of Atmospheric Indices  (Table 1)

  Table of Oceanic Indices  (Table 2)

  Time Series

  Time-Longitude Sections

  Mean & Anomaly Fields

  Appendix 1: Outside Contributions

Tropical Highlights


The pattern of tropical sea surface temperature (SST) anomalies

Tropical Highlights - January 2015



During January 2015, sea surface temperatures (SSTs) remained above-average across the western and central equatorial Pacific, and became below average in the eastern equatorial Pacific (Fig. T18, Table T2). The latest monthly Niņo indices were +0.9°C for the Niņo 4 region, +0.5°C for the Niņo 3.4 region, and -0.4°C for the Niņo 1+2 region (Table T2, Fig. T5). The overall depth of the oceanic thermocline (measured by the depth of the 20°C isotherm) was near-average across the equatorial Pacific (Figs. T15, T16). However, an extensive area of positive subsurface anomalies persisted near the Date Line, while negative anomalies were prevalent closer to the surface east of 110°W (Fig. T17).

Also during January, the low-level easterly trade winds remained near-average across much of the equatorial Pacific (Table T1, Fig. T20). Meanwhile, tropical convection remained enhanced across Indonesia and western equatorial Pacific, and suppressed near the Date Line (Figs. T25, E3). Collectively, these oceanic and atmospheric anomalies reflect a continuation of ENSO-neutral conditions.


For the latest status of the ENSO cycle see the ENSO Diagnostic Discussion at:

NOAA/ National Weather Service
NOAA Center for Weather and Climate Prediction
Climate Prediction Center
5830 University Research Court
College Park, Maryland 20740
Page Author: Climate Prediction Center Internet Team
Page Last Modified: February 2015
Information Quality
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities