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 flood inquiry: Concerns raised about quarry wall years before 2011 flood, commission hears

12:48 EST

A neighbour alerted council to a large embankment wall being built at a quarry years before it was blamed by some locals for contributing to the deadly 2011 Grantham flood, an inquiry has been told.

Loddon, Central Goldfields shires question revised Draft Victorian Floodplain Management Strategy

09:39 EST

Two central Victorian councils have raised concerns about a revised floodplain management strategy for the state.

Tenders called for new Torryburn bridge

06:39 EST

Dungog Council is getting on with the job of building a replacement bridge for one in the tiny community of Torryburn that was washed away in recent floods.