Highlights - April 2023
2023, sea surface
temperatures (SSTs) were above-average in the western
and the far eastern equatorial Pacific (Fig.
T18). The latest monthly Niņo indices were +2.5C for
the Niņo 1+2 region, +0.2C for the Niņo 3.4 region and +0.4C for the Niņo 3 region (Table T2). The depth of the oceanic thermocline
(measured by the depth of the 20C isotherm) was above-average across the
equatorial Pacific (Figs. T15, T16). The
corresponding sub-surface temperatures were 1-7C above-average in the far
eastern equatorial Pacific (Fig. T17).
Also during April, the lower-level and
upper-level winds were near average across most of the equatorial Pacific (Figs. T20, T21). Meanwhile, tropical convection was suppressed
over the central equatorial Pacific (Fig.
T25). Collectively, these oceanic and
atmospheric anomalies were consistent with ENSO-neutral conditions.
For the latest status of the ENSO
cycle see the ENSO Diagnostic Discussion at: http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso_advisory/index.html