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

NSW weather: Severe thunderstorm works its way from Sydney to state's north

22:27 EDT

Trampolines have flown into powerlines and a lightning strike has reportedly caused a house fire as a severe thunderstorm tracked from Sydney all along the coast up to northern NSW on Monday afternoon.

A case of history repeating itself: What is wrong with South Australia's electricity network?

18:43 EDT

Those who blamed last week's blackout in South Australia on renewable energy are dead wrong.

Stormy Monday across Australia

17:03 EDT

Thunderstorms are affecting six states and territories this afternoon, four of which are under warning for severe storms.