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
Soggy week ahead for parts of QLD
13:41 EST
A moisture laden trough will linger across northern and eastern Queensland through the week to come, resulting in large rainfall accumulations.
Super Typhoon Surigae threatening the Philippines with dangerous surf, rain and winds
13:08 EST
Super Typhoon Surigae, as it was named by the JTWC, has strengthened and is looming over the Philippines.
