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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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Queensland weather: Eight rescues as torrential rain floods state's south-east

22:10 EDT

Eight people have been rescued after being caught in flash flooding on the Sunshine and Fraser Coasts as much of the state continues to be hammered by heavy rain.

Queensland weather: Man rescued from floodwaters, heavy rain tipped across state

16:49 EDT

A man has been rescued from floodwater on the Sunshine Coast at Maleny as heavy rain continues to fall along much of Queensland's coastline.

Wet week in eastern Queensland

12:12 EDT

Rivers are swollen in eastern Queensland following the heaviest rain since Cyclone Debbie in some areas.