Australian long range seasonal weather forecast MJO Madden Julian Oscillation
Climate Drivers and Outlooks
Updates daily
Weird graph, but bear with me! This shows the path of a pulse of tropical energy that helps push that tropical moisture around.
When in the green zone tropical moisture is pushed towards Australia. If you are affected by low pressure it helps intensify the rainfall even further. In the tropics it encourages extended periods of wet weather in the wet season. Further south it encourages tropical moisture to meet up with low pressure.
When in the white zone there is no push either way.
When in the brown zone tropical moisture is pushed away from Australia. If you are affected by low pressure the falls can be lighter than usual, even in La Nina or a negative IOD. The Australian tropics generally enter a quiet period even if it is in the wet season.