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NINO3.4 Index
The NINO3.4 index is one of several El Niņo/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 Niņo 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 Niņo or La Niņa event is identified if the 5-month running-average of the NINO3.4 index exceeds +0.4°C for El Niņo or -0.4°C for La Niņa for at least 6 consecutive months.
Southern Oscillation Index
Nino3.4 Index
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Darwin's hottest day of the year?
11:29 AEST Darwin could be heading for its hottest day of 2024 to date this Tuesday, with a top of 35°C on the cards and the potential to edge up towards 36°C.
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- 11:35 AEST No rain for most of Australia this week
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- 16:42 AEST Perth's brief wet, the first rain in weeks
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