NINO3.4 Index
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
Meteor captured on Northern Territory police CCTV raining 'purple light' over Top End
11:52 EST
A meteor has lit up the Northern Territory night sky with a flash that created "daylight" in Alice Springs and a noise that shook windows.
Big falls across Australia's Red Centre
12:37 EST
Central Australia has received a solid soaking over the weekend.
Fog shrouds Australia's southeast
12:05 EST
Thick fog developed over parts of the southeast on Sunday morning with visibility dropping to 100m.
