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Showers & storms, some intense, are scattering across central WA, the NT & Qld, & rain in NE NSW in active troughs. A high is causing brisk winds to ease & most showers to clear in Vic, Tas & SA. The high is keeping much of the country's southern interior & WA's south dry.
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Today, 1:38AM UTC
Heaviest Darwin rain since April as wet season build-up escalates
Darwin recorded its first double-digit daily rainfall total since April in the 24 hours to 9 am Wednesday. While the 16.8 mm that fell in half an hour around 5 pm on Tuesday was far from a major downpour by local standards, it was a clear sign that the wet season is imminent, especially with possible showers on the forecast almost every day in the week ahead. To understand the transition from the dry season to the wet season in Darwin and the Northern Territory's Top End, it's important to distinguish between two key terms: the build-up and the onset. What is the wet season build-up? The wet season build-up is the term used to describe the return of humid conditions to the Top End ahead of the first significant tropical downpours, after months of predominantly dry weather. The build-up typically begins around mid-to-late September and is caused by the shift from winter synoptic patterns to summer patterns. As the Southern Hemisphere transitions from winter to spring, the high pressure systems which bring clear, stable weather to much of interior and northern Australia tend to retreat towards the Southern Ocean. This causes the dry southeasterly trade winds over the Top End to weaken. Meanwhile humidity increases as sea surface temperatures start to rise in northern Australian waters. But the build-up doesn't immediately mean that regular rainfall kicks in. Indeed, it can be quite a frustrating period for locals, as September, October and November are typically Darwin's three hottest months and the humidity can be stifling without the relief of afternoon showers and storms. What is the northern rainfall onset? Image: Median arrival of the Top End rainfall onset in all years. Source: BoM. When the northern rainfall onset arrives, it means the wet season is officially underway. The onset is reached when 50 mm of accumulated rainfall has been recorded since September 1. The figure of 50 millimetres is considered a key threshold because it's roughly the amount which stimulates plant growth. So when you've got 50 millimetres in the gauge (whether from a single storm or from several days of rain), the onset has officially arrived. As the chart at the top of this section shows, the onset tends to arrive later the further south you travel in northern Australia. It also tends to arrive a little later during El Niño years like this one, as the chart below indicates. Image: Median arrival of the Top End rainfall onset in El Niño years. Source: BoM. Interestingly, as of 9 am this Tuesday, October 28, Darwin has accumulated 37 mm of rainfall since September 1. So it will be a close call to see whether this year's Darwin onset officially occurs during the typical period for all years (the last week of October) or during the typical period in El Niño years (the first week of November). It's also worth noting that there is virtually no correlation between an early or late northern rainfall onset and a wet season which is relatively wet or dry by historical standards. Rain also likely in Central Australia this week Image: Predicted rainfall accumulation across the NT from Wednesday, October 28 until the morning of Saturday, October 31, 2026, according to the ECMWF model. Source: Weatherzone. The Top End is not the only part of the NT expecting wet weather this week. As the chart above shows, significant falls are possible over large parts of the territory over the next two days, including in Central Australia. Alice Springs is just one town expecting heavy showers and storms. We'll keep you posted on the weather in the southern NT as this event unfolds.
27 Oct 2026, 2:50AM UTC
Smoke from New Guinea fires reaches northern Australia
A large plume of smoke originating from seasonal fires burning in New Guinea has drifted over the Northern Territory's Top End this week. Images captured by the Himawari-9 satellite over the last few days show smoke gradually spreading from New Guinea towards northern Australia. By Tuesday morning, the smoke was extending roughly 1000 km from New Guinea to the Top End. Image: Visible satellite image showing smoke extending from New Guinea to the Top End on Tuesday morning. Source: Weatherzone. The high-level smoke is not having any direct impact at the surface in the NT. However, the large size of the smoke plume showcases the immense scale of the fires that have been scorching parts of Indonesia and Papua New Guinea in recent weeks and months. While fires are a regular occurrence in Indonesia and Papua New Guinea between August and November, this year’s blazes have been enhanced by abnormally dry conditions under the influence of El Niño. Some areas in the south of Papua New Guinea have gone more than 100 days without any rainfall, according to the PNG National Weather Service. The map below shows that large areas of Indonesia and Papua New Guinea have seen less than 10% of their average rainfall over the past 90 days. Image: Percentage of average precipitation during the 90-day period ending on October 24, 2026. Source: NOAA. According to NASA, this season’s fires in Papua New Guinea had released 32 megatons of carbon by October 17, which is the highest year-to-date total in NASA’s satellite record. Indonesia’s 35 megatons of fire-driven carbon emissions to the same date were also the highest since 2015 (also an El Niño year). Increasing shower and thunderstorm activity has helped reduce fire activity over parts of Indonesia and Papua New Guinea in recent weeks. However, fire activity is expected to remain active until heavier and more persistent monsoonal rain arrives later in the year.
27 Oct 2026, 12:23AM UTC
Late October freeze in five states
The mercury hit the freezing point in four states and one territory overnight with just five weeks remaining in spring. Here's a breakdown of the lowest recorded temperatures on Tuesday morning in New South Wales, Victoria, Tasmania, South Australia and the ACT. Perisher (NSW) -3.8°C. Kunanyi/Mt Wellington (Tas) -2.8°C Mt Buller (Vic) -2.3°C Mt Ginini (ACT) -1.5°C Keith West (SA) 0.0°C While most of the coldest overnight readings were in mountainous areas, it's worth noting that some locations at much lower elevations also fell below zero overnight. For example, the mercury in Goulburn in NSW fell to -0.6°C (its coldest night of the month to date) while the small town of Cressy, near Launceston in Tasmania's north at an elevation around just 150 metres, dipped to the same temperature. Keith West in South Australia (the state's coldest overnight reading as per the list above) is another inland low-elevation location at just 27 metres above sea level, however it was exceptionally calm overnight, which allowed signfiicant cooling. Why was it so cold in southeastern Australia overnight? Image: Mean sea level pressure and 850 hPa temperatures across Australia at 5 am (AEDT) on Tuesday, October 27, 2026. Source: Weatherzone. After a cold front swept across the southeast on Sunday with widespread rain and storms both preceding and accompanying it, the airmass has rapidly dried, especially on the mainland, as a high pressure system centred southwest of Australia extends a ridge across the continent. This has created the cool, mostly calm conditions overnight across the southeast. While a little snow again fell in elevated parts of Tasmania on Monday night into Tuesday morning after a slightly heavier fall the night before (see image below), most of Victoria and southern inland NSW were dry overnight. Image: The snow cam at Mt Mawson, about two hours NW of Hobart, on the morning of Monday, October 26, 2026. Source: Mt Mawson. Tropical influences further north prevent significant overnight cooling When winter or spring minimums hit the freezing point or lower in Australia's southeast, the cold often extends further north to places like the NSW Northern Tablelands and Queensland's Granite Belt. But that was definitely not the case overnight. Glen Innes in northern NSW – which in 2023 recorded Australia's coldest temperature for the entire year – had a mild minimum of 11.6°C overnight, its seventh straight night of double-digit minimums in a month where the long-term average low is 5.8°C. In Queensland, no location on the Granite Belt (or anywhere in the state) recorded a minimum as low as 15 degrees. Meanwhile, unstable weather will continue in parts of Queensland, with showers and storms most likely this Tuesday in northwest, central and southeast Queensland. From Wednesday onwards, the wet and stormy weather starts to contract further north, mainly impacting northern and central regions. For the southeastern corner of the country, there's at least one more chilly night in store. There's even the chance of a light frost in Canberra on Wednesday and Thursday mornings.