State Seasonal Update
Interactive Drought Map
Farm Resources
State Seasonal Update Archive
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State Seasonal Update
Interactive Drought Map
Farm Resources
State Seasonal Update Archive
Subscribe to the State Seasonal Update
Back to DPI Climate
NSW Summary
Monthly indicators
Seasonal conditions and drought assessment
Combined Drought Indicator (CDI)
Soil Water Index (SWI)
Plant Growth Index (PGI)
Rainfall Index (RI)
Drought Direction Index (DDI)
About the individual indicators
Climate analysis
Rainfall Analysis
Temperature Analysis
Extreme event analysis
Crop and pasture condition
Farm water availability
On ground reporting
Climate outlook and drivers
Climate outlook
NSW outlook
National outlook
Global climate drivers
El Niño–Southern Oscillation (ENSO)
Southern Oscillation Index
Sea surface temperatures (SST)
Sub-surface sea temperatures
Indian Ocean (IOD)
Southern Annular Mode (SAM)
Regional breakdown
Overview
Central Tablelands LLS region
Central West LLS region
Greater Sydney LLS region
Hunter LLS region
Murray LLS region
North Coast LLS region
Northern Tablelands LLS region
North West LLS region
Riverina LLS region
South-East LLS region
Western LLS region
About the program
The Combined Drought Indicator
Acknowledgements
Subscribe to the State Seasonal Update
NSW Summary
Monthly indicators
Seasonal conditions and drought assessment
Combined Drought Indicator (CDI)
Soil Water Index (SWI)
Plant Growth Index (PGI)
Rainfall Index (RI)
Drought Direction Index (DDI)
About the individual indicators
Climate analysis
Rainfall Analysis
Temperature Analysis
Extreme event analysis
Crop and pasture condition
Farm water availability
On ground reporting
Climate outlook and drivers
Climate outlook
NSW outlook
National outlook
Global climate drivers
El Niño–Southern Oscillation (ENSO)
Southern Oscillation Index
Sea surface temperatures (SST)
Sub-surface sea temperatures
Indian Ocean (IOD)
Southern Annular Mode (SAM)
Regional breakdown
Overview
Central Tablelands LLS region
Central West LLS region
Greater Sydney LLS region
Hunter LLS region
Murray LLS region
North Coast LLS region
Northern Tablelands LLS region
North West LLS region
Riverina LLS region
South-East LLS region
Western LLS region
About the program
The Combined Drought Indicator
Acknowledgements
Subscribe to the State Seasonal Update
State Seasonal Update
Climate outlook and drivers
Global climate drivers
Southern Oscillation Index
April 2024
Southern Oscillation Index (SOI)
The 30-day Southern Oscillation Index (SOI) for the 30 days to 28 April 2024 was -8.5 (Figure 23). The 90-day SOI value was -7.3.
Sustained negative values of the SOI below −7 typically indicate El Niño while sustained positive values above +7 typically indicate La Niña.
Latest 30-day moving SOI
Sourced from the Australian Bureau of Meteorology
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Sourced from the Australian Bureau of Meteorology
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