NINO3.4 Index

  • index
  • SOI
  • NINO3.4

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

BOM warns Tropical Cyclone Kimi due to make landfall in Far North Queensland tonight

11:57 EDT

Fitzroy Island evacuated as Far North Queensland authorities prepare for the second tropical cyclone of the summer, with Cyclone Kimi predicted to make landfall in the area around Cardwell this evening.

Tropical Cyclone Kimi gaining strength ahead of possible landfall

10:55 EDT

Tropical Cyclone Kimi could cause flooding rain and destructive winds in parts of northeast Queensland during the next couple of days.

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