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A low and trough over western and central WA are bringing widely scattered showers and thunderstorms. Gusty southwesterlies behind a cold front are driving showers over southeast SA, Vic, and Tas. Isolated showers and storms over the tropics.
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Today, 2:15AM UTC
Vietnam deluge close to world record for highest daily rainfall
A rain gauge in Vietnam registered almost 1.8 metres of rain in 24 hours last week, which is close to the current world record for the highest daily rainfall in recorded history. A combination of the remnants of Severe Tropical Storm Fengshen, moisture-laden easterly winds and orographic lifting over mountains in central Vietnam caused a prolonged period of heavy rain between October 22 and 28. This lengthy spell of heavy rain resulted in flooding and landslides across parts of central Vietnam, with reports of at least 37 deaths and tens of thousands displaced from their homes. Colossal rainfall in central Vietnam The heaviest rain during this event occurred around the cities of Huế and Hội An on the country’s central coast. A rain gauge in the Bạch Mã National Park, located to the south of Huế, registered 1,739 mm of rain in the 24 hours ending at 7pm on October 27. This was within 100 mm of the world record for the heaviest 24-hour rainfall, which currently stands at 1,825 mm from Foc-Foc, Rèunion Island on January 7, 1966. For comparison to Australia, the annual average rainfall in Sydney is just over 1,200 mm and even tropical Darwin usually only sees about 1,730 mm of rain each year. The highest directly observed daily rainfall on record in Australia was 907 mm at Crohamhurst in Queensland on February 3, 1893. However, analysis of an extreme two-day rainfall event in 1979 indicates that around 1,352.5 mm is likely to have fallen at the top of Mount Bellenden Ker in the 24 hours ending at 9am on January 5, 1979. The rain that inundated central Vietnam last week was significantly heavier than anything ever observed in Australia. More heavy rain on the horizon Looking ahead, another typhoon is expected to hit central Vietnam later this week, delivering more heavy rain to areas still recovering from the late-October deluge. Typhoon Kalmaegi, which is currently located near Palawan in the Philippines, will gain strength as it crosses the South China Sea on Wednesday and Thursday before hitting Vietnam on Thursday night into Friday morning. At this stage, Kalmaegi is expected to make landfall several hundred kilometres to the south of the Huế region. However, flood-weary areas of central Vietnam are still likely to see periods of heavy rain over the coming week as Typhoon Kalmaegi approaches and crosses the coast. Image: Forecast accumulated rainfall during the next 7 days. Heavy rain from the remnants of Typhoon Kalmaegi will also spread across parts of Cambodia, southern Laos and Thailand towards the end of this week.
04 Nov 2025, 4:48AM UTC
Tropical cyclone season begins with warm oceans surrounding northern Australia
The 2025-26 tropical cyclone season has begun with abnormally warm oceans surrounding northern Australia, signalling an increased risk for severe tropical cyclones in the coming months. The Australian tropical cyclone season runs from November 1 to April 30. During this six-month period, there are usually about 9 to 10 tropical cyclones in the Australian region, with around half of these typically becoming severe tropical cyclones (category three or higher). This season has potential to feature an unusually high proportion of severe tropical cyclones due to abnormally warm ocean temperatures near northern Australia. All tropical cyclones need sea surface temperatures at or above 26.5°C to form. Once over this threshold, the rate at which tropical cyclones can intensify generally increases with higher ocean temperatures. Sea surface temperatures to the north of Australia are currently above 27°C and even higher than 31°C in some areas near the to the Top End and in the Gulf of Carpentaria. These temperatures are about 1 to 3°C above average and rank in the top 10 percent of historical records for this time of year. Image: Sea surface temperature anomalies in the Gulf of Carpentaria on October 31, showing warmer-than-normal water for the start of the tropical cyclone season. Source: IMOS Image: Sea surface temperature centiles in the Gulf of Carpentaria on October 31. The red areas show where temperature area in the highest 10 percent of historical records. Source: IMOS Having so much warm water near northern Australia at the start of November means there is abundant fuel for tropical cyclone development this season. Tropical cyclones that form in the Australian region in the coming months will have a higher-than-normal potential to strengthen into severe tropical cyclones, thanks to the abnormally warm oceans surrounding northern Australia.
03 Nov 2025, 10:20PM UTC
Snowing in Victoria on Melbourne Cup Day
It’s a chilly one for those celebrating the Melbourne Cup Day public holiday outdoors on this first Tuesday in November, with snow blanketing the high country of Victoria and New South Wales in the wake of a cold front which crossed southeastern Australia overnight. Melbourne itself could struggle to reach the BoM's forecast maximum of 17°C and it will feel as much as five degrees cooler for most of the day due to persistent gusty westerly winds. Image: The date stamp on the snow cam image reveals the unseasonable snowfall with the ski runs looking like winter again at Mt Hotham, Victoria. Source: Hotham Alpine Resort. Those westerlies will be accompanied by intermittent showers and there’s even the possibility of a thunderstorm in the unstable cold airmass. The chance of showers in Melbourne appears to be highest during the mid-afternoon. Meanwhile Melbourne received 22.4mm of rainfall in the 24 hours to 9am Tuesday, following 14.6mm the previous day. That’s a two-day total of 37mm, which continued the recent wet trend. Melbourne has actually had a relatively dry year to date in 2025, with below-average rainfall in seven of the 10 completed months. One month which did exceed the average was October, and most locals would be pleased to see the damp spell spilling into early November. Further south, Hobart has had its wettest day since July, with 25mm in the gauge to 9am this Tuesday. Image: Four-hour combined satellite and radar loop showing persistent rain in SE Tasmania as night turned to day on Tuesday, November 4, 2025. Interestingly, Tasmania has seen none of the snow that continues to fall in the Victorian Alps and Snowy Mountains of NSW this Tuesday. That’s due to the position of the dynamic low pressure system west of Tasmania system which is feeding moist, relatively warm northerlies to eastern Tasmania while cold southerlies push onto the southern mainland.




