Agriculture Weather


NINO3.4 Index

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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

Broken Hill cops a drenching with half of all last year's rainfall falling in just 20 minutes

18:56 EST

Dry outback towns in the New South Wales far west have been drenched with their heaviest rainfalls in recent years including Broken Hill, hit with unusual flash flooding.

Northern Territory September rain and thunderstorms

13:12 EST

A low pressure trough has drawn in tropical moisture and spread it across northern parts of the Northern Territory, resulting in significant September rain and a few storms.