El Nino Southern Oscillation The El Nino-Southern Oscillation (ENSO) is currently neutral. The outlook remains El Nino WATCH, meaning there is approximately a 50% chance of El Nino developing in mid-2019. Tropical Pacific sea surface and sub-surface temperatures remain warmer than average, but since late 2018 they have cooled from El Nino-like values towards ENSO-neutral values. Atmospheric indicators such as cloudiness, trade winds and SOI all continue to generally remain within the ENSO-neutral range. The ENSO outlook is at El Nino WATCH.
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