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Positive SST anomalies are also present across the Maritime Continent and the south Pacific, whereas the waters on the northern Australia coastline have largely returned to normal except in the northwest.Persistent NINO3 or NINO3.4 values cooler than −0.8 °C are typically indicative of La Niña, while persistent values warmer than 0.8 °C are typical of El Niño.However, a weak La Niña will often have less influence on Australian rainfall compared to a strong event.La Niña events can also increase the likelihood of prolonged warm spells for southeast Australia.Latest values for the week ending 28 January are: NINO3 −0.8 °C, NINO3.4 −0.6 °C, NINO4 −0.3 °C.A marine heatwave with large positive SST anomalies persists across the Tasman Sea, extending from south-eastern Australia to New Zealand.The Indian Ocean Dipole (IOD) is currently neutral.
Only one out of the eight models maintains La Niña levels into winter (June), while three models are in the neutral range by February.
Sea surface temperatures (SSTs) remain cooler than average in the central and eastern tropical Pacific for the week ending 28 January.
However, these cool anomalies have warmed slightly in the last fortnight.
Indicators of the El Niño–Southern Oscillation (ENSO) continue to reflect La Niña.
Sea surface temperatures show a weak La Niña pattern, with the coolest waters concentrated in the eastern Pacific Ocean.