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.
One year anniversary of destructive Brisbane hail storm; residents reminded to prepare for storm season
It is a year today since Brisbane was smashed by the worst hail storm in 30 years, one that left a trail of destruction and a damage bill of more than $1.3 billion.
Drought affected farmers and businesses in the Walgett Shire are getting a reprieve, with the Council agreeing to waive the interest on overdue rates.
Australia lived up to it's reputation yesterday, with a vast contrast in conditions across the states.