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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

Outlook not great for SA firefighters

15:39 EDT

Conditions will not be favourable for fires burning north of Adelaide as warming temperatures, little rain and strengthening winds move across the region early next week.

Publican tells of "frightening" fire that swept through Olary

13:33 EDT

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Thunderstorms crack dawn in Darwin

13:10 EDT

A severe thunderstorm tore through Darwin early this morning, bringing damaging winds and heavy rainfall totals.