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||Dum In Mirrie Airstrip
|NSW/ACT||Kalang (Kooroowi )
(Lower North Coast)
|Kalang (Spicketts Ck )
(Lower North Coast)
|Cooks Ck (Kalang)
(Lower North Coast)
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 20 January 2015, rainfall was recorded across northern and eastern Australia.
At the start of the week, a strong low was located off Tasmania’s east coast, with an associated pressure trough extending into Queensland where it connected with the monsoon trough across northern Australia. Rainfall across Victoria, southern New South Wales and Tasmania was recorded on the first day of the week. Very heavy rain in southeastern Tasmania fell on the morning of the 14th resulted in storm damage and some flooding.
In the north, frequent showers and storms were recorded across eastern and northern Queensland, the northern half of the Northern Territory and across the Kimberley in Western Australia. Some of these storms brought very heavy rain, with flash flooding reported in parts of north and north-west Queensland at mid-week.
Cold fronts crossing Tasmania in the second half of the week brought moderate rainfall totals to the east coast.
At the end of the week the monsoon trough weakened as a tropical low developed over the Kimberley before moving off shore of the Pilbara coast. This low was associated with very heavy rainfall and flash flooding in parts of the Kimberley.
During the last day of the week, surface troughs over the eastern mainland combined with onshore flow to generate moderate rainfall along the coast in the northern half of New South Wales and in southeastern Queensland, with some areas of heavy falls in New South Wales.
Rainfall totals in excess of 100 mm were recorded in parts of the Kimberley, large areas of the north of the Northern Territory, parts of inland northern Queensland, western and southern Tasmania and a small pocket on New South Wales’ Lower North Coast. The highest weekly total was 264 mm at Dum In Mirrie Airstrip in the Darwin–Daly District of the Northern Territory. A scattering of other locations in the areas listed recorded totals in excess of 150 mm or 200 mm.
Rainfall totals between 10 mm and 50 mm were recorded surrounding areas of higher falls and across the remainder of northern and eastern Queensland, eastern to central New South Wales, much of Victoria except the northwest, and the remainder of Tasmania. Small parts of the Pilbara coast and southeastern South Australia also recorded weekly totals in excess of 10 mm.
Most of Western Australia, South Australia, the south of the Northern Territory and the area between southwestern Queensland and northwestern Victoria recorded little or no rainfall for the week
The Drought Statement issued on 7 January, discusses rainfall deficits over Australia for the 6-month (July 2014 to December 2014), 13-month (December 2013 to December 2014) and 27-month (October 2012 to December 2014) periods. The rainfall deficit maps will be 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 6-month, 13-month and 27-months ending 20 January 2015. Only the areas that experienced serious or severe rainfall deficiencies for the corresponding period ending December 2014 are analysed, the rest of the map is masked in grey shading.
|Rainfall to date for 6-month period|
|Rainfall to date for 13-month period|
|Rainfall to date for 27-month period|
Rainfall in the past week has lessened rainfall deficiencies across the southern Cape York Peninsula in Queensland, although deficiencies persist with much of the Peninsula having recorded between 60 and 40% of average rainfall for the period to 20 January. Elsewhere deficiencies generally remain similar to last week, with some slight easing of deficiencies in central Victoria. Parts of central southern South Australia have received less than 50% of average rainfall for the period to 20 January, rising to 60% to 70% across southeast South Australia and western Victoria.
Rainfall in the past week has also slightly lessened deficiencies for the 13-month period for affected parts of eastern Australia. Large areas of western Victoria, southeastern Queensland and northeastern New South Wales have received less than 80% of average rainfall for the period ending 20 January.
Deficiencies have also eased for the 27-month period across inland northern and central Queensland, and to a lesser extent for southern Queensland and western Victoria. Large areas of Queensland, an area of northern inland New South Wales and much of western Victoria has received less than 80% of average rainfall for the period to 20 January.
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