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NINO3.4 Index

  • index
  • SOI
  • NINO3.4

The NINO3.4 index is one of several El Niño/Southern Oscillation (ENSO) indicators based on sea surface temperatures.

NINO3.4 is the average sea surface temperature anomaly in the region bounded by 5°N to 5°S, from 170°W to 120°W. This region has large variability on El Niño time scales, and is close to the region where changes in local sea-surface temperature are important for shifting the large region of rainfall typically located in the far western Pacific.

An El Niño or La Niña event is identified if the 5-month running-average of the NINO3.4 index exceeds +0.4°C for El Niño or -0.4°C for La Niña for at least 6 consecutive months.

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Weather News

Storms ease across south-east Queensland

21:20 EDT

Towns in Queensland's south-east have been hit by storms, but Brisbane has escaped much of the rainfall and the weather is no longer regarded as severe.

Dry spring set to continue across NSW

17:59 EDT

The start of spring has been unusually dry across most of New South Wales.

Queensland coast warned to prepare for hot, fast fire season

14:52 EDT

The Queensland Rural Fire Service says fires on parts of the state's coast will burn hotter and faster this season due to the ongoing dry.