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
Strong winds lash the southeast
13:15 EDT
A vigorous cold front has swept through parts of the southeast, bringing wind gusts in excess of 100km/h to some exposed and elevated parts.
When it rains, it pours over NSW
13:07 EDT
Parts of New South Wales have recorded their best daily April rainfall in decades, as a strong cold front and trough sweeped over the state overnight.
Sunflowers brighten up the Liverpool Plains countryside after years of drought
10:41 EDT
From dry and dusty paddocks an increasingly rare crop is flowering on the New South Wales Liverpool Plains, standing as a symbol of recovery from an intense one-in-100-year drought.
