Rare dry season rain is soaking parts of northern Australia this week, with Darwin just copping its heaviest September rain in 43 years. Northern Australia is still technically in its dry season, which officially runs from May to September and is characterised by very little rainfall. While Darwin is notorious for heavy rain and thunderstorms in the wet season, the city usually receives about 44 mm of rain during an average dry season. However, a rare September soaking delivered more than this entire seasonal average within a few hours early on Tuesday morning.
Darwin Airport picked up 52.4 mm of rain between 1am and 9am on Tuesday morning, with most of this falling before 6am. This was Darwin’s highest daily rainfall in September since 1981 and it more than tripled the city’s monthly average for September.
Causes of the Unseasonal Rainfall
The unusually heavy dry season rain was caused by humid easterly winds feeding into an upper-level trough sitting above northern WA. Warmer-than-average sea surface temperatures near northern Australia are likely contributing to the atmospheric moisture that produced Tuesday morning’s rainfall.
Potential for More Rain
Showers will ease over northern Australia on Wednesday and Thursday as the upper-level trough weakens. Looking ahead, another round of heavier rain and thunderstorms could develop over parts of WA and the NT late this week and early next week as a new trough develops over WA. There is still some uncertainty regarding this system, so be sure to check the latest forecasts and warnings throughout the next week.
Impacts of the Heavy Rainfall
The heavy rainfall has caused disruptions to traffic and daily routines in Darwin. Commuters faced significant delays due to road closures and accidents. The downpour also led to the cancellation or postponement of several outdoor events, including sporting matches and concerts. Despite the inconveniences, the rainfall has provided much-needed relief to the region, which has been experiencing drought conditions in recent years.
Local Reactions and Response
Residents of Darwin have expressed surprise and delight at the unseasonal rain. Many have taken to social media to share photos and videos of the heavy downpour and its impact on the city. The Northern Territory Government has urged residents to stay informed about the latest weather forecasts and warnings, and to take precautions to stay safe during the wet weather.
Looking Ahead: A Shift in Weather Patterns?
While the recent heavy rainfall in Darwin is an anomaly, it is a reminder of the unpredictable nature of the Australian climate. Experts believe that climate change could lead to more frequent and extreme weather events in the future. This could include more intense storms, droughts, and floods, potentially impacting the region's agricultural sector, water resources, and infrastructure.
The recent rainfall in Darwin is a stark reminder of the importance of being prepared for any weather event, regardless of the season. As the world grapples with climate change, it is essential to stay informed, adapt to changing conditions, and build resilience to ensure the safety and well-being of all communities.
