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
Climate drivers align to give average chance of rain – which at least is better than what it's been
06:13 EDT
Just days after some of the worst bushfires ever seen in Australia, the Bureau of Meteorology tweeted on January 8 that a climate driver called the Indian Ocean Dipole had returned to neutral.
Wet-season storms drop 'best rain in years' across Territory cattle country
06:12 EDT
Wet-season storms have delivered much-needed rain across Northern Territory cattle country, with drought-affected Barkly producers among those to benefit from the downpour.
BOM forecasts Sydney to hit 41C as NSW braces for hot weather and bushfire flare ups
05:30 EDT
NSW is set for a day of wild weather with scorching temperatures, dust storms, damaging winds and the risk of bushfires reigniting after a week of rain.
