The forecasting range for SAM is relatively short at only 2 weeks ahead but it is far enough to gauge a trending pattern. Models are confident in a huge negative dive next week. This will allow for an increased number of deep polar low pressure systems to impact Australia and thats exactly what the pressure, temperature and snow charts are showing. Below image showing the SAM / AAO past observations (black line) and 2 week forecast via CPC. Circled in red is the deep negative forecast values for next week.