The 30-day SOI remains positive and indicating a La Nina, with the 90-day average firming. The latest technical report from NCEP (US) this week reports a strengthening Walker Circulation (tropical air flow in the troposphere), which acts as a large-scale conveyor belt for moisture reaching Australia. The atmosphere is gradually responding to the warm ocean temperatures.. Darwin hPA is now below 1010, which is a good sign for moisture transport over inland Australia. SOI explained here

Click on the image to see the latest values courtesy longpaddock.com.au