Weekly Rainfall Update

For the week to 21 June 2016, rainfall was recorded in much of Queensland and New South Wales, eastern and central Victoria, western Tasmania, southern and central areas of South Australia, eastern and southern areas of the Northern Territory and southern areas of Western Australia.

At the start of the week, a low pressure system and surface trough moved slowly across southern parts of Western Australia and produced moderate falls in the Goldfields and along the southern coast. The low pressure system tracked over the Great Australian Bight with the associated surface trough extending into South Australia. Moderate rainfall totals were recorded in the Northwest Pastoral district and in parts of the Eyre and Yorke Peninsulas. Middle-level cloud extended into western Victoria and western New South Wales, producing moderate rainfall in northwestern New South Wales, parts of northern Victoria, and western Tasmania as a weak cold front also tracked across Tasmania.

By the middle of the week, a cloudband formed east of a deep surface trough located over western Queensland and New South Wales. The trough moved eastwards, generating thunderstorms and widespread rainfall, with moderate rainfall totals in the southern interior of the Northern Territory, western and southern Queensland, and northern and central New South Wales.

An upper-level trough intensified as it tracked east into western Queensland, resulting in a deepening of a surface tough over the interior of Queensland and northern New South Wales. Widespread, moderate falls were recorded across most of Queensland. As the system continued to move eastwards, and a low pressure centre developed over central New South Wales, generating moderate to heavy falls across large parts of eastern Australia, including eastern Victoria.

A moist, onshore southeasterly flow brought persistent shower activity to Queensland’s north tropical coast during the week.

Rainfall totals between 50 and 100 mm were recorded in parts of the Eyre Peninsula and southern parts of the Northwest Pastoral districts in South Australia, parts of the elevated areas of the Victorian Alps and Snowy Mountains in New South Wales, and in central and northern New South Wales. Similar totals were recorded in western and central Queensland extending just across the Northern Territory and Queensland border, and along the east coast of Queensland and northeastern New South Wales. Totals in excess of 100 mm were recorded in Queensland's central west, and along its north tropical, central and southeast coasts.

Rainfall totals between 10 mm and 50 mm were recorded in southwest and southern Western Australia, central and northeastern areas of South Australia, most of Victoria except the western areas, and in western and northern Tasmania. Similar totals were recorded across most of New South Wales, Queensland, and in southern and eastern parts of the Northern Territory.

Remaining parts of Western Australia, the northwest of South Australia and the north and west of the Northern Territory recorded little or no rainfall this week.

 

Impact of recent rainfall on deficits

The Drought Statement, issued on 7 June 2016, discusses rainfall deficits over Australia for the 13-month (May 2015–May 2016) period. The rainfall deficit map is available for this period as well as for standard periods.

The map below shows the percentage of mean rainfall that has been received for the rainfall deficit period for the 13-month period ending 21 June.

Rainfall for the period 1 May 2015 to 21 June 2016

Rainfall deficiencies for the 13-month period (May 2015–May 2016) continue to affect an area of southeastern South Australia, southwest and central Victoria. Deficiencies also continue in a small area of southwest Western Australia, and along pockets of the Pilbara and Kimberley coasts. Deficiencies still exist in Queensland’s central west, but have eased slightly.

A significant contraction of deficiencies has occurred in western Tasmania, with only a small area on the northwest affected by rainfall deficiencies. In northern Australia, deficiencies contracted substantially near the coast of the Top End, and in Cape York Peninsula.

Affected areas in southwest Western Australia, southeastern South Australia, western and central Victoria have received less than 70 % to 80 % of average rainfall for the period. Affected areas of the Northern Territory, northern and central Queensland have received less than 70% of average rainfall for the period, while the Kimberley and northern Gascoyne have received less than 50% to 60% of average.

Following the rainfall last week, there was an easing of deficiencies in central Queensland and parts of central Victoria.

 

Map of rainfall totals for this week

Product code: IDCKGRWAR0