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A low and trough over western and central WA are bringing widely scattered showers and thunderstorms, and into western SA. Gusty westerlies are driving showers over western Tas. Isolated showers and storms over the tropics in unstable airmasses.
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Today, 5:58AM UTC
Rain and severe storms lash southern WA
Unseasonable rain is falling across large parts of Western Australia this Wednesday and is set to continue into Thursday as an active cut-off low pressure system and associated troughs cross the southern half of the state. While Perth caught only 7.2mm millimetres of rain overnight, numerous locations in the state’s South West Land Division received falls in the 10-20mm range in the 24 hours to 9am Wednesday. November is usually when the southwest starts to dry out dramatically, but rain and scattered storms continue this Wednesday from the Gascoyne to the Goldfields and plenty of places in between. Just after 2pm (AWST), the BoM issued a severe thunderstorm warning for large hailstones, damaging winds and heavy rainfall for people in parts of the Central West, Great Southern, Central Wheat Belt, Gascoyne, Goldfields, Lower West and South West forecast districts. Image: Combined satellite and radar loop for southwest WA in the four hours from 8:50am to 12:50pm (AWST) on November 5, 2025. The chart above shows the dynamic action of the low centred over the sea just off Geraldton this Wednesday. Bands of cloud with associated areas of rain (green on the Weatherzone radar) can be clearly seen pushing across a large area, with the rain arriving from an unusual northeasterly direction in places like Albany in the state’s South Coastal forecast district. 28.8 mm was recorded during a thunderstorm at Arradale, a weather station just southeast of Geraldton, in only half an hour just before 2pm. The wet weather will reach the Southern Interior and Eucla forecast districts by Thursday, and as this system tracks east, it’s worth noting that parts of WA’s southern and eastern interior have already seen unusually wet weather in recent times. For example: Kalgoorlie saw its heaviest day of October rainfall on record last month, with 60mm, and has picked up another 8.4mm from this event to 1pm (AWST) with more expected. Eucla, way out on the Nullarbor just 11km from the SA border, picked up 46mm on the first day of this month, on the back of almost 100mm in October. Its average rainfall in both months is only around 20mm. Image: The unusual sight of almost all of WA seeing average or above-average rainfall over a 3-month period from the start of August through to the end of October. Source: BoM. As the chart above shows, almost all of WA has had a comparatively wet time in the past three months – with the exception of the region around Esperance which is seeing handy falls this Wednesday. Even after a wet winter and early spring, most West Australians who live in the state’s southwest corner will welcome the current rain event after years of annual rainfall deficiencies, as they head into what are traditionally the driest months. READ MORE: Perth sets rainfall streak not seen in 18 years
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.




