" NINO3.4 Index
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NSW/ACT Sat 17:16 EST: Flood Warning - Belubula River   Sat 16:05 EST: Coastal Wind Warning   Sat 16:01 EST: Sheep Graziers Warning   Sat 10:25 EST: Flood Warning - Bogan River   Sat 09:58 EST: Flood Warning - MacQuarie River   Sat 08:54 EST: Flood Warning - Lachlan River   Queensland Sat 11:08 EST: Flood Warning - Thomson/Barcoo/Cooper Ck   Fri 13:52 EST: Flood Warning - Fitzroy River   Fri 10:33 EST: Flood Warning - Diamantina River   Fri 08:13 EST: Flood Warning - Burdekin River   South Australia Sat 16:39 CST: Sheep Graziers Warning   Sat 16:38 CST: Coastal Wind Warning   Tasmania Sat 18:55 EST: Coastal Wind Warning   Sat 16:35 EST: Flood Warning - Derwent River   Sat 16:21 EST: Flood Warning - South Esk   Sat 16:19 EST: Road Weather Alert   Sat 16:19 EST: Sheep Graziers Warning   Sat 16:03 EST: Bushwalking Alert   Sat 16:01 EST: Flood Warning - North Esk River   Sat 15:56 EST: Flood Warning - Macquarie   Sat 15:30 EST: Flood Warning - Meander River   Sat 08:43 EST: Flood Warning - Jordan River   Victoria Sat 17:53 EST: Flood Warning - Murray River upstream of Hume Weir   Sat 17:36 EST: Flood Warning - Kiewa River   Sat 17:12 EST: Flood Warning - King River   Sat 16:50 EST: Flood Warning - Goulburn River   Sat 16:44 EST: Flood Warning - Macalister River   Sat 16:40 EST: Coastal Strong Wind/Gale Warning   Sat 16:08 EST: Severe Weather Warning   Sat 16:00 EST: Flood warning for Seven Creeks / Castle Creek   Sat 15:07 EST: Flood Warning - Mitchell River   Sat 12:23 EST: Flood Advice - North East Victoria   Sat 10:04 EST: Flood Warning - Mitta Mitta River   Sat 05:51 EST: Flood Warning - Westernport   Western Australia Sat 16:00 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.