Weekly Rainfall Update

Weekly Rainfall Update
for 7 days to 9 am 19 August 2014

The Weekly Rainfall Update provides a detailed analysis of the rainfall recorded across the country during the past week. The page is updated every Tuesday afternoon, for the seven days ending that day. The update includes a rainfall map, a table of the highest falls recorded for the week by state, some commentary and an analysis of the impact of recent rainfall on parts of Australia experiencing rainfall deficits.

Table of highest weekly totals

State Highest 2nd Highest 3rd Highest
WA Mundaring
(66 mm)
(Central Coast)
Balingup
(64 mm)
(South Coast)
Bickley
(55 mm)
(Central Coast)
NT No rainfall recorded

SA Arkaroola
(61 mm)
(Far North)
Wilpena Pound
(43 mm)
(Upper North)
Boolcoomatta
(35 mm)
(Northeast)
Qld Rocky Point Sugar Mill
(118 mm)
(Moreton)
Rainbow Beach
(115 mm)
(Moreton)
Toolara
(109 mm)
(Moreton)
NSW/ACT Robertson (Caalong Street)
(324 mm)
(Illawarra)
Beaumont (The Cedars)
(322 mm)
(Illawarra)
Robertson (The Pie Shop)
(322 mm)
(Illawarra)
Vic Mount Wellington
(147 mm)
(West Gippsland)
Bullumwaal
(147 mm)
(East Gippsland)
Buchan (Snowy River)
(111 mm)
(East Gippsland)
Tas Mount Read
(34 mm)
(West Coast)
Maatsuyker Island
(16 mm)
(Southeast)
Low Rocky Point
(14 mm)
(West Coast)

State weekly rainfall bulletins (updated daily):

Northern WA | Southern WA | NT | Qld. | NSW/ACT | Vic. | SA | Tas.

The table above lists the highest rainfall totals for each state and territory for the past week. These are based on real-time rainfall reports, and only limited quality control has been performed on the data. Rainfall district names are given in parentheses. Please also note that some station names have been shortened by taking away words such as post office and airport. Map of the Bureau of Meteorology rainfall districts.

In creating the weekly rainfall map, the rainfall recorded at sites across Australia is analysed onto grids and displayed as a map. In data-rich areas, such as southeast Australia, or in regions with strong rainfall gradients, such as across mountain ranges, 'data smoothing' may occur, resulting in gridpoint values differing from the exact rainfall amounts measured at the contributing stations.

Commentary on recent rainfall

For the week ending 19 August 2014, rainfall was recorded in Queensland, New South Wales, eastern Victoria, parts of eastern South Australia, southwest Western Australia, and southwestern Tasmania.

At the beginning of the week, an upper-level low pressure system located near the border of South Australia and New South Wales led to a surface trough developing over western Queensland. By the 15th, a low pressure system had developed over northwest New South Wales and the end of the surface trough.

The systems deepened and moved east-southeast across Queensland with rain areas and isolated thunderstorms bringing moderate falls to southern Queensland, northwestern New South Wales and parts of eastern South Australia.

As the low pressure system reached the New South Wales coast in the second half of the week, the system became complex with multiple centres of low pressure emerging and localised heavy rain falling on the southern and central coast of New South Wales and far eastern Victoria.

During the week, a cold front first crossed southern parts of Western Australia before tracking through Tasmania with some light falls recorded in southwest Western Australia and western Tasmania. In the final days of the week a strong cold front and low pressure system approached southwest Western Australia with a westerly air stream persisting over southern parts of Western Australia, bringing moderate falls to the coastal southwest.

Rainfall totals over 300 mm were reported on the south coast of New South Wales. The highest weekly rainfall total of 324 mm was recorded at Robertson (Caalong Street) in New South Wales.

Rainfall totals between 100 mm and 200 mm were recorded in the coastal strip of southern New South Wales and isolated parts of the Victorian Alps.

Rainfall totals between 50 mm and 100 mm were recorded in parts of inland, coastal and southeastern New South Wales, southern and southeastern Queensland as well as isolated patches of the Queensland interior, central coast and north tropical coast, much of far eastern Victoria, and isolated areas of eastern South Australia.

Rainfall totals between 15 mm and 50 mm were recorded in several places including: southwest Western Australia and an isolated patch of the Southeast District in Western Australia; eastern South Australia; most of the remainder of New South Wales, except the southern inland area; Gippsland and northeast Victoria; parts of west coast Tasmania; and southern half of Queensland from about Cairns on the north tropical coast to Thargomindah in the southwest.

Rainfall totals over 10 mm were recorded in areas surrounding higher falls in southwest Western Australia, eastern South Australia, southern New South Wales, west coast Tasmania and the southern half of Queensland.

The Northern Territory and remaining parts of Western Australia, South Australia, Victoria and Queensland, and the eastern half of Tasmania recorded
little or no rainfall for the week.

Impact of recent rainfall on deficits

The Drought Statement issued on 7 August, discusses rainfall deficits over Australia for the 8-month (December 2013 to July 2014) and the 22-month (October 2012 to July 2014) period ending 31 July 2014. The rainfall deficit maps are available for the 8-month and 22-month period 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 8-month and 22-months ending 19 August 2014. Only the areas that experienced serious or severe rainfall deficiencies for the corresponding period ending 31 July 2014 are analysed, the rest of the map is masked in grey shading.

Rainfall to date for 8-month period
Drought Period 1- click on map for larger image

Rainfall to date for 22-month period
Drought Period 2- click on map for larger image


Rainfall for the period December 2013 to 19 August 2014

For the 8-month period commencing December 2013, serious to severe deficiencies (lowest 10% to 5% of records) are in place in large areas of northeastern New South Wales, southeastern Queensland and in isolated pockets of central Queensland, a small area of the central Top End and along the coast of southeastern Tasmania.

Rainfall during the last week has eased deficiencies in large areas if eastern and southern Queensland, and northeastern New South Wales, although large parts of this area continue to have recorded less that 60% of their average rainfall for the period.

Rainfall for the period October 2012 to 19 August 2014

For the 22-month period commencing October 2012, serious to severe deficiencies (lowest 10% to 5% of records) remain in a large area of inland Queensland away from the eastern coast and also in smaller areas in adjacent parts of the Northern Territory and South Australia, and in an area inland of the Great Dividing Range extending from southern Queensland into northern New South Wales.

Compared to last week, deficiencies have eased somewhat in northern New South Wales and southern and inland northern Queensland. Areas of inland Queensland and parts of adjacent States and an area of the coast of Western Australia have received less than 60% of average rainfall for the period, climbing to less than 50% of average rainfall for the area around northeastern South Australia.

Please Note: The Australian Bureau of Meteorology is not responsible for drought declarations. Drought declarations are the responsibility of the State Governments, and take account of other factors in addition to recent rainfall patterns. Some links to state government departmental web sites are given in the right hand column.

Product Code: IDCKGRWAR0