Weekly Rainfall Update

For the week to 19 June 2018, rainfall was recorded in western and southern Western Australia; southern South Australia; across Victoria and Tasmania; southern and central coast New South Wales, and western Queensland.

At the start of the week, a series of upper level troughs moved eastwards across Queensland, and produced showers, storms and areas of rain over western and northwestern parts of the State. A complex low pressure system passed south of Tasmania while an associated cold front tracked across southern South Australia and Victoria. Moderate falls were recorded in northwestern Tasmania, and elevated areas of the Victorian Alps and Snowy Mountains.

Another complex low pressure system deepened over the east of the Great Australian Bight and, by the middle of the week, moved slowly across the south of Tasmania. The system directed a strong, gusty southerly flow across southeastern Australia. Snow fell across Alpine regions in Victoria, the Snowy Mountains, elevated areas of the Brindabella Ranges in the Australian Capital Territory, and the South West Slopes of New South Wales.

A vigorous westerly airstream with embedded cold fronts affected southeastern Australia during the rest of the week, with a trailing surface trough lingering off the New South Wales coast at the end of the week. Moderate falls were recorded across the southeastern South Australia, most of southern and eastern Victoria, western Tasmania, and elevated areas of the Snowy Mountains and about the central coast in New South Wales.

At the end of the week, a cold front and a pre-frontal trough moved over the west of Western Australia, with an associated cloudband bringing showers and moderate falls to the southwest Pilbara, the Gascoyne, and much of the South West Land Division.

Rainfall totals in excess of 100 mm were recorded in elevated areas of the Victorian Alps and Snowy Mountains, the Mount Lofty Ranges in South Australia, and much of western Tasmania. The highest weekly total was 170 mm at Perisher Valley in the Victorian Alps.

Rainfall totals between 50 mm and 100 mm were recorded about Northwest Cape on the Pilbara coast in Western Australia; far southeast South Australia; southern and northeastern Victoria; the South West Slopes in inland southeastern New South Wales; and the western half of Tasmania.

Rainfall totals between 10 mm and 50 mm were observed in the Gascoyne, parts of the Central Wheat Belt and along much of the southern and western coast of Western Australia; along the central coast and southeast of South Australia; most of Victoria except parts of the northwest; the eastern half of Tasmania; southeastern and the central coast of New South Wales, except some areas on and east of the ranges; and northwestern and western Queensland.

Little or no rainfall was recorded in Western Australia away from the west and southern coast; South Australia away from the coast; most of the Northern Territory; most of the northern half of New South Wales; and much of Queensland except the northwest and western districts.

Impact of recent rainfall on deficits

The Drought Statement, issued on 4 June 2018, discusses rainfall deficits over Australia for the 5-month (January–May 2018) period 14-month (April 2017–May 2018). Rainfall deficit maps are available for these periods as well as for standard periods.

The maps below show the percentage of mean rainfall that has been received for the rainfall deficit period for the 5-month 14-month periods ending 19 June 2018.

Rainfall for the period 1 January to 19 June 2018

Serious to severe deficiencies for the 5-month period affect much of New South Wales except the southeast and northeast coasts, southern Queensland, and eastern and southeastern South Australia. Smaller areas of Gippsland in Victoria, about Lake Eyre / Kati Thanda in South Australia, and in the South Coastal District and near Shark Bay on the west coast of Western Australia are also in serious to severe deficiencies.

Rainfall in the last week has eased deficiencies slightly on the west coast near Shark Bay, southeastern South Australia, northwestern and eastern Victoria, and southern New South Wales.

Affected areas of central and western New South Wales, southern Queensland and northeastern South Australia have mostly received between 20% and 40% of average rainfall for the period. Affected areas from southwest, and central to eastern New South Wales, northwestern Victoria, southeastern South Australian and southwest Western Australia received 30% to 60% of average for the period. Much of the affected region in Gippsland in Victoria has received less than 70% of average rainfall since 1 January 2018.

Rainfall for the period 1 April 2107 to 19 June 2018

Serious to severe deficiencies for the 14-month period are evident across much of New South Wales away from the northeast coast and southern border, large areas of southern to central Queensland, and most of Gippsland in eastern Victoria. Deficiencies are also in place across parts of South Australia from Lake Eyre / Kati Thanda, Ceduna and Gulf St Vincent, around the coast of Western Australia from Karratha to Bremer Bay, and along the east coast of Tasmania. 

Rainfall in the past week had little impact on deficiencies in affected areas. 

Affected areas about the northwest coast of Western Australia have generally received between 30% and 50% of average, with areas further south reaching 70% to 80% of average for the period. Deficiencies have changed little in the east, where affected areas of Queensland, New South Wales and South Australia have received between 30% and 60% of average rainfall for the period.

Map of rainfall totals for this week

Product code: IDCKGRWAR0