Fairfax Media Network

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.

Display Your Local Weather

Weather News

Grantham floods inquiry: Denis Wagner considers legal options after report finds quarry impact 'insignificant'

07:47 EDT

The former owner of the Grantham quarry is considering his legal options after an inquiry found it did not contribute to the town's deadly 2011 floods.

Grantham floods inquiry: Quarry played 'insignificant' role in disaster, commission rules

19:22 EDT

The Grantham Floods Commission of Inquiry has ruled the Grantham quarry played little role in the deadly 2011 flood and its owners were unjustly blamed.

In pictures: Aurora australis puts on colourful light show over southern Victoria, Tasmania

18:35 EDT

The aurora australis has put on a colourful show over parts of southern Victoria and Tasmania overnight.