Weekly Rainfall Update

For the week to 14 August, rainfall was recorded in the southwest quadrant and along the southern coast of Western Australia; in southern South Australia; most of Victoria except the far east; Tasmania; and southern inland New South Wales.

At the start of the week, a cold front and associated cloudband tracked across southeastern Australia and generated moderate falls in southeastern South Australian, a broad area over Victoria from the South West to North East districts, and western and northern Tasmania. Parts of southern inland New South Wales received mostly light rainfall.

A strong cold front tracked through western and southern Western Australia, with an associated cloudband extending down to the Great Australian Bight, and a cold southwesterly airstream in its wake. Moderate rainfall was recorded in much of the South West Land Division, while light falls were recorded in the Gascoyne, Goldfields and Eucla coast.

In the middle of the week, southeastern Australia experienced pre-frontal strong and gusty northwesterly winds, rain, and cold southerly winds in quick secession as the second front and associated cloudband moved through the region. Moderate rainfall was recorded in southern South Australia, southern and eastern parts of Victoria except Gippsland, the Australian Capital Territory, and eastern and central Tasmania.

At the end of the week, a cloudband and a weak cold front moved through Tasmania to bring moderate rainfall to western parts of the State. In the country's west, a cold front tracked through southwest Western Australia, with moderate rainfall recorded along the coast.

Rainfall totals in excess of 100 mm were recorded in the western parts of Tasmania, and isolated spots in the Victorian Alps. The highest weekly total was 210 mm at Mount Read in western Tasmania.

Rainfall totals between 50 mm and 100 mm were recorded in coastal parts of the South West Land Division in Western Australia; elevated areas in the Victorian Alps and the Snowy Mountains in New South Wales, and in western Tasmania.

Rainfall totals between 10 mm and 50 mm were recorded in remaining areas of the South West Land Division and the southern coast of Western Australia; southern South Australia; most of Victoria except the far east and northwest; most of Tasmania, and southeastern inland New South Wales.

Little or no rainfall was recorded in remaining parts of Western Australia, most of Northern Territory, most of Queensland, most of New South Wales apart from the southeast inland, northwestern and eastern Victoria.

Impact of recent rainfall on deficits

The Drought Statement, issued on 2 August 2018, discusses rainfall deficits over Australia for the 4-month (April–July 2018), the 7-month (January–July 2018) and 16-month (April 2017–July 2018) periods. 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 4-month, 7-month and 16-month periods ending 14 August 2018.

Rainfall for the period 1 April 2018 to 14 August 2018

Serious to severe rainfall deficiencies for the 4-month period are in place across large parts of southern Western Australia extending into the northern Goldfields and central interior; large areas in the southwest of the Northern Territory; northwestern, southern and far eastern South Australia; most of New South Wales except the northeast and southeast coasts; southern, western and central Queensland and small areas around the Gulf Country and Cape York Peninsula.

Affected areas of southern Western Australia, southern parts of South Australia, southern and eastern New South Wales, and areas of eastern Queensland have received between 20% and 70% of average rainfall for the period. Affected areas of the Northern Territory and across the border into the central interior of Western Australia, northwestern and eastern South Australia, northwestern New South Wales, western and central Queensland have received less than 30% of average for the period.

Rainfall for the period 1 January 2018 to 14 August 2018

Serious to severe rainfall deficiencies for the 7-month period are in place across much of western and central New South Wales; adjacent areas of the Darling Downs and Far Southwest Queensland, and an area of the Central Highlands and Coalfields District; large areas of eastern South Australia, extending to the Eyre Peninsula; northwestern Victoria, and smaller areas of Gippsland. Serious to severe rainfall deficiencies also persist in Western Australia in the South Coastal District.

Affected areas of central and northwestern New South Wales, southwestern Queensland and northeastern South Australia have mostly received below 30% of average rainfall for the period. Affected areas from southwest, and central to eastern New South Wales, northwestern Victoria, southeastern South Australian received 30% to 60% of average for the period. Affected areas in Western Australia received 50% to 70% of the average.

Rainfall for the period 1 April 2017 to 14 August 2018

Serious to severe rainfall deficiencies for the 16-month period are in place across much of New South Wales away from the northeast coast and southern border, large areas of southern to central Queensland and small areas of western Queensland, and most of Gippsland in eastern Victoria.

Deficiencies are also evident in South Australia about Kati Thanda–Lake Eyre, and from Ceduna across the northern Eyre to Yorke Peninsulas to parts of the Flinders Ranges and Murraylands District, and also across Kangaroo Island. Deficiencies are also present along the western and southern coast of Western Australia from Shark Bay to around Esperance and scattered areas further inland, and along the east coast of Tasmania.

Affected areas along the west coast of Western Australia have generally received between 50% and 70% of average. Rainfall in affected areas of Queensland, New South Wales and South Australia has generally been between 20% and 60% of average for the period.

Map of rainfall totals for this week

Product code: IDCKGRWAR0