For the first time in three years, three monthly average SSTSST Sea Surface Temperatures in the ENSOENSO El Niño–Southern Oscillation is an irregular periodic variation in winds and sea surface temperatures over the tropical eastern Pacific Ocean, affecting the climate of much of the tropics and subtropics. The warming phase of the sea temperature is known as El Niño and the cooling phase as La Niña. 3.4 region are above average. Depending on whose rules you follow this may be the precursor to an El NiñoEl Niño El Niño 'The Boy' is the warm phase of the El Niño–Southern Oscillation and is associated with a band of warm ocean water that develops in the central and east-central equatorial Pacific later this year when SST get 0.5°C above the LTALTA Long Term Average. This is usually defined as a 30 year period by the WMO.. It’s all rather complicated when they begin and end, the Americans have one method, so too do the BOMBOM The Bureau of Meteorology (BOM or BoM) is an executive agency of the Australian Government responsible for providing weather services to Australia and surrounding areas. in Australia and the JMAJMA The Japan Meteorological Agency (気象庁, Kishō-chō), abbreviated JMA, is an agency of the Ministry of Land, Infrastructure, Transport and Tourism. in Japan. Isn’t sorting problems concerning climate and weather like this what the WMOWMO The World Meteorological Organisation is a specialized agency of the United Nations responsible for promoting international cooperation on atmospheric science, climatology, hydrology and geophysics. exist for?