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NINO3.4 Index

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  • Aus

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.

Southern Oscillation Index

SOI

Nino3.4 Index

Nino3.4
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Weather News

Unseasonable warmth continuing for South Australia

16:56 EST

A slow moving airmass and mostly sunny skies has brought well above average temperatures to much of SA, and will continue to on Monday.

Dousing for southwest WA

13:21 EST

A strong frontal system is bringing some heavy falls of rain to southwest parts of Western Australia.

Dry end to the wet season for the Top End

15:19 EST

A generally healthy wet season across the Northern Territory's Top End is having a very dry April to finish it off.