Weekly Rainfall Update

For the week to 24 November 2020, rainfall was recorded in the northern and central pockets of Western Australia, much of the western Top End in the Northern Territory, parts of the east coast of Queensland, south-east and inland north-east New South Wales and large parts of southern and eastern Victoria.

At the start of the week, a surface trough was located across the Kimberley and the Top End , and from the Gulf Country to the south-east of Queensland. Showers and thunderstorms developed over the Kimberley, western parts of the Top End in the Northern Territory, and in the south-east coast of Queensland. Another surface trough extended from the Pilbara, through to central and south-east Western Australia, with isolated thunderstorms developing over parts of the Southern Interior District, and in areas of south-west South Australia. Onshore flow brought showers to the east coast of Queensland, and moderate falls were recorded over the tip of the Cape York Peninsula east coast, and about the north tropical Queensland coast.

From the middle of the week, broad surface troughs were located in northern and eastern Western Australia, the Northern Territory, through South Australia and towards eastern New South Wales. The troughs and an upper-level disturbance produced isolated showers, thunderstorms and patchy cloud across the north-west, central and inland eastern New South Wales. Widespread moderate falls were reported in the Kimberley in Western Australia and the north-west Top End in the Northern Territory. Widespread moderate falls were also reported over south-east New South Wales and much of southern and eastern Victoria, with the light falls reported over remaining areas of Victoria and large parts of southern New South Wales.

Rainfall totals between 50 mm and 100 mm were reported in about the Kimberley coast in Western Australia; north-west parts of the Top End in the Northern Territory, and the Central, the West and South Gippsland districts in Victoria. Isolated spots in the north tropical coast in Queensland and the Australian Capital Territory also recorded weekly rainfall totals in excess of 50 mm. The highest weekly total was 127 mm at Truscott in the north Kimberley coast in Western Australia.

Rainfall totals between 10 mm and 50 mm were reported in the Kimberley and a small area in central Western Australia, the north-west Top End and central parts of the Northern Territory, parts of east coast Queensland, an area of north-east and south-east New South Wales, and southern and eastern half of Victoria.

Impact of recent rainfall on deficits

Rainfall deficits over Australia for the 7-month (April–October 2020) period is discussed in the Drought Statement, which was  issued on 6 November 2020.

Rainfall deficit maps are available for this period as well as for standard periods. The map below show the percentage of mean rainfall that has been received for the rainfall deficit period for the 7-month period, extended to the week ending 24 November 2020.

Rainfall for the period 1 April to 24 November 2020

Serious or severe rainfall deficiencies for the 7-month period are in place in Western Australia across most of the southern half of the State, excluding parts of the coast in the west Gascoyne, southern parts of the SWLD, and the south-east of the state. Deficiencies have increased in severity some parts of the west of Western Australia, while decreasing or being removed in the state's south-east. Serious rainfall deficiencies are also affecting scattered pockets in greater south-east Queensland.

Inland areas of Western Australia have generally received less than 20% their average for the period, while remaining areas in Western Australia and areas in south-east Queensland and have generally received less than 80 % to 40% of their average for the period.

Map of rainfall totals for this week

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