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.
|State||Highest||2nd Highest||3rd Highest|
|NT||Yirrkala Tropical Gardens
|Qld||Tree House Creek
|Tully Sugar Mill
The table above lists the highest rainfall totals for each State and the Northern 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.
For the week to 21 April 2015, rainfall was recorded in all States and Territories.
At the start of the week, light to moderate falls
were recorded in southwest and southeastern Western Australia,
southwestern South Australia, central and eastern Victoria, and
northern and western Tasmania as a cold front and associated surface trough tracked across the Great Australian Bight.
A high pressure system in the Tasman Sea directed a moist onshore
airflow onto the east coast of Australia, producing moderate
falls along the north tropical and central coasts of Queensland
and in isolated parts of the Gulf Country.
During the middle to latter part of the week, an established surface trough extended from northwest Western Australia, through central Australia to a low pressure system and cold front intensifying near the central New South Wales coast. Heavy falls were recorded in the Flinders and Mid North districts in South Australia with moderate falls extending into the southern parts of the North East Pastoral district. Moderate falls were recorded across southern South Australia and western New South Wales, with lighter rain in southern New South Wales and western Tasmania. Thunderstorm activity in the north generated isolated moderate rainfall in parts of the Kimberley and the Top End. Light rainfall was also recorded around Alice Springs.
In the last part of the week, a surface trough extending through western Queensland, western New South Wales and central Victoria brought moderate to heavy falls to northeastern Victoria, and moderate falls to southern New South Wales and eastern South Australia. A strengthening cold front crossing southeastern Australia combined with a surface trough that extended along the east coast of Queensland and northern New South Wales. Moderate falls were recorded on Queensland's north tropical coast and northeastern Peninsula, parts of southern and central Queensland, eastern and southern New South Wales, and parts of eastern Victoria and in western Tasmania.
At the end of the week, the complex system intensified into an east coast low off the New South Wales coast, producing very heavy rainfall in the central east coast of New South Wales, particularly the Hunter and Manning districts, with moderate falls extending into central and northeastern New South Wales and southeastern Queensland.Moderate falls were recorded along the Pilbara and west Kimberley coasts as thunderstorms formed along a surface trough located along the west coast of Western Australia.
Rainfall totals in excess of 50 mm were recorded in part of the Kimberley and Pilbara in Western Australia, the eastern tip of Arnhem Land, the north tropical coast of Queensland, an area in South Australia extending from the Flinders Ranges to about Mildura in Victoria, in northeastern Victoria, and in central eastern New South Wales. Totals in excess of 150 mm were recorded in the Hunter, Illawarra and Sydney region. The highest weekly total of 315 mm was at Gostwyck Bridge in New South Wales.
Rainfall totals between 10 mm and 50 mm were recorded in the Kimberley and Pilbara, and parts of southern inland Western Australia, around Alice Springs and the northern Top End in the Northern Territory, along the eastern seaboard of Queensland and areas of the Gulf Country. This covered a broad area from southern Queensland through eastern and southern South Australia, the southeast mainland except western Victoria and far southeastern South Australia, and also in western Tasmania.
of western Queensland, parts of the north and southwest of the Northern
Territory, northwestern South Australia, eastern and southwest Western
Australia, and eastern Tasmania received little or no rainfall this
The Drought Statement, issued on 8 April 2015, discusses rainfall deficits over Australia for the 9-month (July 2014–March 2015), and 30-month (October 2012–March 2015) periods. 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 9-month and 30-month periods ending 21 April 2015. Only the areas that experienced serious or severe rainfall deficiencies for the corresponding period ending March 2015 are analysed, the rest of the map is masked in grey shading.
|Rainfall to date for 9-month period|
|Rainfall to date for 30-month period|
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.
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