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Moist onshore winds are bringing gusty showers and storms to northeast NSW and southeast Qld. Tropical moisture feeding into a front to the south is generating rain and some storms over SA. Moist easterly winds direct showers over the NT's eastern Top End and Qld's east.
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Today, 1:47AM UTC
Perth to receive much needed rainfall
Water storage for Perth is currently at 36.6% of capacity, which is lower than any other Australian capital city, but moisture from the tropics will fuel much needed rainfall across southwest WA this week. As seen below, a low pressure system located offshore from the Gascoyne is tapping into abundant moisture from the tropics and it will be directing that moisture over southwest WA this week. Image: Animation of water vapour imagery on 26 April 2026. Source: Weatherzone. This moisture will fuel widespread rain across southwest WA on Monday with the potential for isolated thunderstorms and heavy falls. Precipitation will then tend to scattered showers and isolated thunderstorms across the region on Tuesday and early Wednesday. Rainfall totals of 10-30mm will be common across the Perth Metro by Wednesday morning, but isolated locations may see totals exceeding 50mm. Showers will then become rather light and isolated later Wednesday and on Thursday as a ridge of high pressure builds over southwest WA. So far this month, Perth has received only 16mm of rainfall but the additional rainfall expected early this week could push that figure above the April average of 39mm.
25 Apr 2026, 4:03AM UTC
Adelaide's warm spell comes to an end
Adelaideans have been treated to late-season warmth this week and today was no exception. The maximum temperature so far today for Adelaide (West Terrace) has been 28.2°C which is 6 degrees warmer than Adelaide's average maximum temperature for the month of April. The previous four days were also unseasonably warm with the following maximum temperatures recorded: 30.5°C on Tuesday, 21 April 29.3°C on Wednesday, 22 April 29.7°C on Thursday, 23 April 28.6°C on Friday, 24 April With an average maximum temperature of 29.48°C across those four days, this was Adelaide's warmest 4-day spell so late in the season since 1921. The unseasonable warmth will come to an end in Adelaide today. A surface trough is expected to pass over the capital city later this afternoon, bringing a cool southerly change. Cooler temperatures will follow early next week but maximum temperatures are expected to reach the upper 20s again from Wednesday. Image: Weather forecast for Adelaide for the next seven days. Source: Weatherzone.
24 Apr 2026, 5:00AM UTC
Contrails – what are they and why did they appear over Bass Strait today?
At 8:00 am on Friday morning, a smattering of high clouds could be seen passing over Bass Strait and southern Victoria. By 8:30 am, just half an hour later, a thin line of cloud had suddenly appeared, stretching 200 km across the sky to the southeast of Lorne. The peculiar cloud was captured in visible satellite images, appearing as a pencil-thin line of white cloud that was clearly distinguishable from the more ragged cloud formations around it. Image: Satellite images showing a contrail appearing over Bass Strait on Friday, April 24, 2026. Source: Weatherzone. The cloud was one of several contrails that formed over the Bass Strait region on Friday morning. What is a contrail? Contrails refer to clouds that form in the wake of aeroplanes. As the name suggests, these clouds are produced by condensation in the wake of an aeroplane, making a visible condensation trail, or contrail. Condensation in the atmosphere refers to the process where water vapour (a gas) condenses into water droplets (a liquid). This usually happens when the air is cooled until it becomes saturated and can’t hold any more water vapour. Aeroplane engines emit relatively warm and humid air into a very cold layer of the atmosphere when they cruise along at high altitude. This jet engine exhaust is made up of about 30% water vapour. As this warm and humid air exits the jet engine, it quickly cools and mixes into the atmosphere in the jet’s turbulent wake. This rapidly cooling air becomes saturated, causing condensation to occur. The water droplets then quickly freeze into ice crystals. Image: Contrails over northern Florida on the morning of January 9, 2004. Source: NASA Worldview / Terra. Particulate matter emitted by the jet engines also acts as cloud condensation nuclei, providing a surface for the water vapour to condense onto. This particulate matter helps initiate the condensation process, making it easier for contrails to form. What caused the contrails over Bass Strait on Friday? Conditions were ideal for contrails to form above southern Vic and Bass Strait on Friday morning. A layer of upper-level moisture sitting about 9 to 12 km above the ground meant that the air was already close to being saturated. The temperature of this layer was also around -40 to -60°C. When planes flew through this layer of air on Friday morning, their jet engine exhaust easily caused condensation and produced contrails. Are contrails dangerous? Contrails are like naturally occurring clouds and pose no direct health risk to humans. However, contrails are influencing climate change. The cirrus clouds caused by contrails affect how much of the Sun’s radiation enters and exits Earth’s atmosphere. By adding more high-level clouds to Earth’s atmosphere, contrails help trap outgoing longwave radiation, which enhances warming in the atmosphere. This is still an active area of research as scientists try to figure out how much the cirrus clouds caused by contrails will influence climate change in the future.




