A systematic analysis of the main weather types influencing southern Australian rainfall is presented for the period 1979–2015. This incorporates two multi-method datasets of cold fronts and low pressure systems, which indicate the more robust fronts and lows as distinguished from the weaker and less impactful events that are often indicated only by a single method. The front and low pressure system datasets are then combined with a dataset of environmental conditions associated with thunderstorms, as well as datasets of warm fronts and high pressure systems. The results demonstrate that these weather types collectively account for about 86% of days and more than 98% of rainfall in Australia south of 25° S. We also show how the key rain-bearing weather systems vary throughout the year and for different regions, with the co-occurrence of simultaneous lows, fronts and thunderstorm conditions particularly important during the spring and summer months in southeast Australia.

对1979-2015年期间影响澳大利亚南部降雨的主要天气类型进行了系统分析。它合并了冷锋和低压系统的两个多方法数据集，这些数据集指示了更强的锋面和低点，这与通常仅用一种方法表示的较弱且影响较小的事件有所区别。然后将前部和低压系统数据集与与雷暴有关的环境条件数据集以及暖锋和高压系统的数据集结合。结果表明，在25°S以南的澳大利亚，这些天气类型合计约占白天的86％，降雨量超过98％。我们还展示了关键的带雨天气系统全年以及不同地区的变化，