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NINO3.4 Index

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  • Aus

The NINO3.4 index is one of several El Niņo/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 Niņo 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 Niņo or La Niņa event is identified if the 5-month running-average of the NINO3.4 index exceeds +0.4°C for El Niņo or -0.4°C for La Niņa for at least 6 consecutive months.

Southern Oscillation Index

SOI

Nino3.4 Index

Nino3.4
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Weather News

Another bout of heat for Perth

16:16 EDT

Another bout of heat for Perth Perth has finally cooled down to about average summer levels over the last few days, and is on track to heat up to a balmy 32 degrees today.

Heat and powerful surf on the way for coastal southeast QLD

12:55 EDT

After a slight dip in temperatures yesterday, warmer days are on the way from the Coolangatta area to the Sunshine Coast region.

Heat put on hold in the southeast

14:24 EDT

Temperatures will cool down for much of the week for South Australia, Victoria and New South Wales.