" NINO3.4 Index
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NSW/ACT Tue 22:45 EST: Sheep Graziers Warning   Tue 22:44 EST: Severe Weather Warning for NSW   Tue 22:42 EST: Coastal Wind Warning   Tue 10:14 EST: Flood Warning - Bogan River   Tue 09:25 EST: Flood Warning - Lachlan River   Northern Territory Tue 22:00 CST: Coastal Wind/Gale Warning   Tue 16:27 CST: Fire Weather Warning For the Northern Territory   Queensland Tue 22:00 EST: Coastal Strong Wind/Gale Warning   Tue 11:03 EST: Flood Warning - Warrego River   Tue 09:36 EST: Flood Warning - Thomson/Barcoo/Cooper Ck   Mon 10:09 EST: Flood Warning - Diamantina River   South Australia Wed 02:38 CST: Flood Warning - Onkaparinga River   Tue 23:58 CST: Severe Weather Warning for SA   Tue 22:52 CST: Sheep Graziers Warning   Tue 22:45 CST: Road Weather Alert   Tue 22:16 CST: Coastal Wind Warning   Tue 09:43 CST: Flood Watch   Tasmania Tue 22:12 EST: Severe Weather Warning for TAS   Tue 22:00 EST: Coastal Wind Warning   Tue 21:35 EST: Road Weather Alert   Tue 21:34 EST: Sheep Graziers Warning   Tue 15:34 EST: Flood Warning - South Esk   Tue 15:29 EST: Flood Warning - North Esk River   Tue 10:01 EST: Flood Watch   Victoria Tue 22:27 EST: Coastal Strong Wind/Gale Warning   Tue 21:40 EST: Severe Weather Warning   Tue 16:34 EST: Flood Warning - King River   Tue 16:10 EST: Sheep Graziers Warning   Tue 11:49 EST: Flood Warning - Thomson River   Tue 11:28 EST: Flood Warning - Latrobe River   Tue 11:27 EST: Flood Warning - Goulburn River   Tue 11:10 EST: Flood Warning - Mitchell River   Tue 11:05 EST: Flood Warning - Macalister River   Tue 10:36 EST: Flood Warning - Murray River upstream of Hume Weir   Tue 10:25 EST: Flood Warning - Kiewa River   Western Australia Tue 22:00 WST: Coastal Wind Warning  

NINO3.4 Index

Weekly / Monthly
NINO3.4 Index

The NINO3.4 index is one of several El Niņo/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 Niņo 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 Niņo or La Niņa event is identified if the 5-month running-average of the NINO3.4 index exceeds +0.4°C for El Niņo or -0.4°C for La Niņa for at least 6 consecutive months.