Weekly Rainfall Update

For the week to 17 July, rainfall was recorded in western and the south coast of Western Australia; southeastern South Australia; western, northern central and far eastern Victoria; western and northern Tasmania; far northeastern New South Wales and the southeastern Queensland coast.

At the start of the week, a weak low pressure system and a cold front tracked over southeastern South Australia and western Victoria to produce moderate falls in these regions. The low then moved over eastern Victoria and generated showers and moderate falls in East Gippsland. Showers and moderate falls were recorded about the southeastern Queensland coast, due to an onshore southeasterly airflow.

In the middle of the week, a weak cold front tracked across southwest Western Australia. The system produced mainly light falls along the southwest coast., while the remainder of the country was mostly clear.

Towards the end of the week, a pair or cold fronts embedded in a vigorous westerly flow tracked over southern Western Australia, led by a thick cloudband. Showers were reported in the southern Gascoyne, the South West Land Division, and southern Goldfields areas with moderate falls in the southwest coast. As the cold fronts tracked eastwards, mostly light falls were recorded along the southeast coast of Western Australia and the exposed southern coast of South Australia. Heavier falls were recorded in western and northern Tasmania.

Rainfall totals in excess of 50 mm were recorded in isolated areas in southeast Queensland and the far southwest coast of Western Australia. The highest weekly total was 95 mm at Cape Moreton Lighthouse in Queensland.

Rainfall totals between 25 mm and 50 mm were recorded in western Tasmania, most of the Lower West and South West districts in Western Australia, a small area in southeastern South Australia, and a pocket of the southeast coast of Queensland.

Rainfall totals between 10 mm and 25 mm were recorded in the southern Gascoyne coast, much of the South West Land Division, and southern Goldfields in Western Australia; southeastern South Australia including Kangaroo Island; far southwestern, northern central and far eastern Victoria; western and much of northern Tasmania; and a small area of northeastern New South Wales and the southeastern Queensland coast.

Little or no rainfall was recorded in remaining parts of Western Australia, the Northern Territory, South Australia away from the southeast coast, central and northwestern Victoria, eastern Tasmania, most of New South Wales and most of Queensland.

Impact of recent rainfall on deficits

The Drought Statement, issued on 10 July 2018, discusses rainfall deficits over Australia for the 6-month (January–June 2018) and 15-month (April 2017–June 2018) periods. 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 6-month and 15-month periods ending 17 July 2018.

Rainfall for the period 1 January to 17 July 2018

Serious to severe rainfall deficiencies for the 6-month period are in place across much of New South Wales (except for the southeast and the northern coasts); adjacent areas of the Darling Downs and Far Southwest Queensland, and an area of the Central Highlands and Coalfields District; large areas of eastern South Australia, extending to the Eyre Peninsula; western to Northern Country Victoria, and smaller areas of Gippsland. Serious to severe rainfall deficiencies also persist in Western Australia in the South Coastal District and south of Shark Bay on the west coast. 

Rainfall in the last week had little impact of deficiencies. Affected areas of central and northwestern New South Wales, southern Queensland and northeastern South Australia have mostly received between 20% and 40% of average rainfall for the period. Affected areas from southwest, and central to eastern New South Wales, northwestern Victoria, southeastern South Australian and southwest Western Australia received 30% to 60% of average for the period.

Rainfall for the period 1 April 2017 to 17 July 2018

Serious to severe rainfall deficiencies for the 15-month period are in place across much of New South Wales (except for the southeast and the northern coasts); adjacent areas of the Darling Downs and Far Southwest Queensland, and an area of the Central Highlands and Coalfields District; large areas of eastern South Australia, extending to the Eyre Peninsula; western to Northern Country Victoria, and smaller areas of Gippsland. Serious to severe rainfall deficiencies also persist in Western Australia in the South Coastal District and south of Shark Bay on the west coast. 

Rainfall in the last week had little impact on deficiencies in affected areas. Affected areas about the northwest coast of Western Australia have generally received between 50% and 70% of average. Deficiencies in affected areas of Queensland, New South Wales and South Australia have received between 30% and 60% of average rainfall for the period.

Map of rainfall totals for this week

Product code: IDCKGRWAR0