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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 - October 2019



During October 2019, sea surface temperatures (SSTs) were below-average in the far eastern equatorial Pacific and above-average across the western and central equatorial Pacific (Fig. T18, Table T2). The latest monthly Niņo indices were -0.8C for the Niņo 1+2 region, +0.6C for the Niņo 3.4 region and +1.0C for the Niņo 4 region (Table T2, Fig. T5). The depth of the oceanic thermocline (measured by the depth of the 20C isotherm) was above-average across the central and eastern equatorial Pacific and below-average in the far eastern equatorial Pacific (Figs. T15, T16). The corresponding sub-surface temperatures were 1-2C above average in the central and eastern equatorial Pacific, and 1-2C below average in the far eastern equatorial Pacific (Fig. T17).


Also during October, the lower-level easterly winds were weaker-than-average (indicated by westerly anomalies) over the eastern equatorial Pacific (Table T1, Fig. T20). The upper-level wind anomalies were easterly over much of the equatorial Pacific (Table T1, Fig. T21). Meanwhile, tropical convection was suppressed across Indonesia and the west-central equatorial Pacific (Figs. T25, E3). Collectively, these oceanic and atmospheric anomalies reflected ENSO-neutral conditions.


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

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