Weekly Rainfall Update

For the week to 26 July 2016, rainfall was recorded in the southwest and along the Pilbara coast of Western Australia. Rainfall was also recorded in Victoria, Tasmania, most of New South Wales, southern parts of South Australia; also  southern, central and the north tropical coast of Queensland.

At the start of the week, a deep surface trough over western Queensland and central New South Wales generated thunderstorms and widespread, moderate rainfall totals in central, western and eastern New South Wales and the central west of Queensland. Meanwhile, a ridge of high pressure located in the southern Coral Sea directed an easterly flow that produced moderate rainfall on the north tropical Queensland coast. A cold front tracked across southwest Western Australia, bringing moderate falls to western parts of the South West Land Division.

The middle of the week saw a series of cold fronts track across southern Australia, with associated cloudbands extending over southeastern Australia. Moderate falls were recorded across southern and coastal parts of South Australia, Victoria, Tasmania and elevated areas of southeastern New South Wales.

In the last part of the week, another cold front tracked across the southeast, while the associated low pressure system moved south of Tasmania. Moderate falls were recorded in parts of southeastern South Australia, elevated areas of the Victorian Alps and the Snowy Mountains, and in western and northern Tasmania. Widespread, light rainfall was also recorded in southern New South Wales, western and northern Victoria.

Rainfall totals exceeding 100 mm were recorded in elevated areas of the Victorian Alps and in the Snowy Mountains in New South Wales, and in western Tasmania. The highest weekly total was 230 mm in Perisher Valley.

Rainfall totals between 50 and 100 mm were recorded along a coastal area of southwest Western Australia, parts of the Mount Lofty Ranges and the lower southeast of South Australia, much of western and northern Tasmania; also areas of central south and northeastern Victoria. Similar totals were also recorded in southeastern and central parts of New South Wales, and in parts of western and northeastern Queensland.

Rainfall totals between 10 mm and 50 mm were recorded in southwest and southern Western Australia; also in the Pilbara of Western Australia. Rainfall totals between 10 mm and 50 mm were also recorded in southeastern South Australia, most of Victoria, large parts of eastern and northern New South Wales, Tasmania, and in southern, western and northeastern Queensland.

The Northern Territory, remaining parts of Western Australia, South Australia away from southeast, western New South Wales, and large parts of eastern, western and northern Queensland recorded little or no rainfall this week.

 

Impact of recent rainfall on deficits

The Drought Statement, issued on 7 July 2016, discusses rainfall deficits over Australia for the 14-month (May 2015–June 2016) period. The 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 14-month period ending 26 July.

Rainfall for the period 1 May 2015 to 26 July 2016

Rainfall deficiencies for the 14-month period (May 2015–June 2016) continue to affect a small area of southeastern South Australia, southwest and central Victoria, but have eased in extent and severity.

Deficiencies also continue to exist along coastal parts of the Cape York Peninsula and the Gulf of Carpentaria, and coastal parts of the Kimberley in Western Australia. Deficiencies also continue in a small area of southwest Western Australia.

Queensland’s central west have seen a marked improvement for this period, with almost all of the deficiencies removed and only small, isolated pockets remaining. The deficiencies in Tasmania have almost been completely removed.

Affected areas of the Kimberley have received less than 40 % to 50 % of average rainfall for the period, while remaining areas affected have received less than 70% to 80% of average rainfall for the period.

 

Map of rainfall totals for this week

Product code: IDCKGRWAR0