Southwest W.A. is usually wettest around winter. January-March rain here doesn't have to be very heavy to be above median. The Indian Ocean is warmer than normal close to Australia. The skill is negligible elsewhere. This outlook represents a summary only.
More detail is available from the contact people and web sites listed below.
4296 Archive of previous Seasonal Climate Outlooks November 1999 rainfall - Decile Distribution. September to November 1999 rainfall - Decile Distribution. Click on the map for full resolution. Cyclone activity in this region is related to the El Ni o-Southern Oscillation phenomenon, with fewer than normal cyclones during El Ni o episodes, and slightly more during La Ni a episodes. They are not, however, categorical predictions about future rainfall, and they are not about rainfall within individual months of the three-month outlook period.