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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.
Southern Oscillation Index
Nino3.4 Index
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500km line of storms sweeping across the Goldfields,WA
12:04 AEST Over 32 thousand lightning strikes hit the Kalgoorlie region on Sunday and Monday, with more rainfall to come at the end of this week for the state’s southwest. The image below shows a 500km line of thunderstorms stretching between Leinster and Salmon Gums on Monday morning as the sun rises. Image: Himawari-9 satellite images for the three hours leading up to 8:20am AWST on Monday, May 6.
- 11:28 AEST Rain every day this week in NSW
- 14:40 AEST Intense Rainfall: Over 100mm in just 3 days over NSW
- 14:36 AEST Riverina's first rain in a month frustrates some, drenches others
- 11:55 AEST Spooky spectre sighting west of Sydney
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