Australia's red centre has experienced an extraordinary weather event this week, with Uluru recording over 100 millimetres of rain in the past two days - extraordinary by any measure for one of the continent's most arid regions. According to weather observations, Yulara Airport near Uluru recorded 76.4 millimetres in the 24 hours to 9am on a recent day, with another 34.4 millimetres falling in just three hours. This two-day deluge represents three times Uluru's typical rainfall for the entire month at this time of year.
The cause of this rare moisture surge is a slow-moving low-pressure trough that has stalled over central Australia. The trough's sluggish movement is key to understanding the unusual intensity. The combination of the trough's slow movement and unusually high atmospheric moisture is creating substantial rainfall in parts of the country that normally receive little precipitation. The Bureau of Meteorology has warned that falls of up to 160 millimetres in a single day are possible in some areas, raising serious flash-flooding risks.
While Uluru itself has managed relatively well, roads leading to the landmark have been closed due to waterlogging. Authorities have asked visitors to exercise caution, remain on marked tracks and paths, and take care on potentially slippery surfaces. The walking tracks remain open despite the heavy conditions.
This rainfall event is not isolated to Uluru. The slow-moving trough is spreading heavy rain across the entire continent. Every state in Australia will receive heavy rainfall this week, with mapping showing parts of each state set to see at least 30 millimetres. Towns such as Coober Pedy in South Australia could be significantly affected, though major centres like Adelaide are expected to avoid the worst of the weather.
The scale of the rainfall in normally arid regions is almost incomprehensible. For the Simpson, Strzelecki, Sturt Stony, and Tirari deserts, which typically receive only about 100 millimetres across an entire year, modelling indicates some locations could receive up to 400 millimetres during this event. This represents a year's worth of moisture arriving in a matter of days. Official flood warnings are in place for Queensland and the Northern Territory, while severe weather warnings cover the northern parts of South Australia.
For agricultural communities and pastoral stations across central Australia, the implications are double-edged. While the rainfall addresses months of extremely dry conditions and provides relief to livestock and farming operations, the intensity and speed of the water also poses threats. Cattle and livestock grazing on vulnerable terrain face risk, and flash flooding can destroy crops and erode soil after such extended drought periods.
The broader context matters here. Uluru sits in the semi-arid zone of central Australia, where weather is extreme and rainfall is difficult to predict. Annual average rainfall at Uluru is just 291 millimetres, and heavy rains are more likely between November and March. This current event, however, far exceeds normal March patterns. While the desert region can experience intense rainfall at any time of year, an event of this magnitude and breadth is genuinely unusual.
Communities and infrastructure managers across Australia are bracing for the impacts of sustained heavy rainfall over several more days. Road closures, power disruptions, and potential isolation of remote settlements are real risks as the low-pressure system continues its slow march across the continent. For some regions, the moisture will be desperately needed after months of heat and dryness. For others, managing the sudden influx of water will test emergency response systems and community resilience.