Weekly Rainfall Update
For the week to 26 October 2021, rainfall was recorded in the South West Land Division, and inland Gascoyne in Western Australia, in the north and central parts of the Northern Territory, in the north, central and east of Queensland, eastern New South Wales, eastern and central Victoria, and Tasmania.
At the start of the week, a cold front and associated cloudband moved across Western Australia, and produced light rainfall to the western half of the state, with moderate falls along the coastal south-west and inland Gascoyne. Light rainfall was also recorded across the state's south coast and the Nullarbor in South Australia. In the east, a trough extended across inland Queensland to the central coast and triggered severe thunderstorms with giant (greater than 5 cm in diameter) to gargantuan (greater than 15 cm in diameter) hail around the Mackay area. Showers with light falls was recorded in the central and south-east coast. Another trough produced moderate rainfall along the north-east New South Wales coast. A severe thunderstorm brought hail and heavy rainfall to Coffs Harbour. An onshore flow produced showers with light to moderate rainfall along the central and south coast of New South Wales coast, and eastern Victoria.
At mid-week, a broad area of low pressure persisted and extended across northern Australia to southern Queensland and south-east Australia, to produce thunderstorms and moderate falls in parts of the north and central Northern Territory; north, central and south-east Queensland; and the central New South Wales coast and further inland. A cold front moved across Tasmania and Victoria and resulted in widespread moderate rainfall to Tasmania, but mostly light falls to southern and eastern Victoria.
At the end of the week, a cold front tracked across south-west Western Australia, and a trough was located near the south-west coast, bringing light to moderate falls to the region. A thunderstorm with small hail was recorded in Perth's surburb of Bentley. A trough extending across Queensland and the Northern Territory to the Kimberley continued to produce thunderstorms and showers. Moderate rainfall was recorded in the north-western Top End and the Carpentaria District in the Northern Territory, the Capricornia District and adjacent Central West District, and the Wide Bay and Burnett District in Queensland.
Rainfall totals in excess of 50 mm were recorded areas in the South Coast and Mid-North Coast districts in New South Wales; the North West, the Capricornia, and Wide Bay and Burnett districts in Queensland; and the West, Central Plateau, North Central and East Coast districts in Tasmania. Spots in the Carpentaria District of the Northern Territory, and in the Perth hills in Western Australia also recorded similar weekly rainfall totals. The highest weekly rainfall was 142.6 mm at Mount Barrow in the north-east of Tasmania.
Rainfall totals between 10 mm and 50 mm were recorded through inland parts of the Gascoyne and most of the South West Land Division of Western Australia, around central and eastern Victoria, Tasmania, along the coast of New South Wales, in the north, central and eastern parts of Queensland south of Townsville, and in the north and central parts of the Northern Territory.
Impact of recent rainfall on deficits
Rainfall deficits over Australia for the 18-month (April 2020–September 2021) period are discussed in the Drought Statement, which issued on 6 October 2021.
Rainfall deficit maps are available for the period as well as for standard periods. The maps to the right shows the percentage of mean rainfall that has been received for the period starting April 2020, and extended to the week ending 26 October 2021.
Rainfall for the period 1 April 2020 to 26 October 2021
Serious or severe rainfall deficiencies for the period commencing April 2020 persist in the Capricornia, and Wide Bay and Burnett districts, and extend west into the Central Highlands District in Queensland, and in a pocket of the west of the state near Boulia. Some isolated areas of deficiencies persist in central regions of Western Australia that missed out on above average winter rain that fell further to the south.
Rainfall in the past week eased deficiencies slightly in small areas of the Wide Bay and Burnett District in Queensland, but had little impact on deficiencies elsewhere.
Areas around Boulia have received less than 50% of their average for the period, and affected areas in Queensland's Capricornia, and Wide Bay and Burnett districts have generally received between 50% and 80% of their average for the period.
Product code: IDCKGRWAR0