El Nino Southern Oscillation  The El Niño-Southern Oscillation (ENSO) outlook remained at El Niño WATCH as climate models showed sea surface temperatures remain close to El Niño threshold, and relevant atmospheric indicators continued at the ENSO neutral phase. The gradual cooling of sub-surface temperatures over the past months weakened in May, while the warm surface temperatures across the equatorial Pacific persist.
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-- Synoptic site
