Oz: Heavy downpours/rain for parts of Australia as high pressure leaves for a time

Low pressure south of Western Australia is bringing wet weather and clouds, while scattered showers are present in South Australia, spreading into western New South Wales and Victoria, with potential thunderstorms. Queensland also sees clouds and eastern coastal showers with lower temperatures. High pressure is moving away from Tasmania, Victoria, and the ACT towards New Zealand. Warmer winds precede a colder change arriving in Western Australia, especially from Perth southwards on Thursday.

Friday brings lower temperatures to Western Australia's southern coast, with thunderstorms and showers inland. Central Australia expects widespread showers, some heavy, particularly in populated areas of South Australia, with potential thunderstorms. New South Wales and Victoria remain mostly dry with mild northerly winds. Tasmania will experience northern showers, and Australia's eastern coastline will have cloudy areas and persistent showers, possibly heavy in northern Queensland. The Northern Territories will also see some showers as the tropical boundary shifts south.

On Saturday, heavy and slow-moving thunderstorms will become more widespread in South Australia, extending to the western border of New South Wales and Victoria. Eastern areas will be mostly dry, aside from coastal showers, especially northward into New South Wales and Queensland. Inland temperatures will rise due to northerly winds, while coastal areas remain cooler. By Sunday, showers move eastward, breaking apart but bringing widespread wet weather to western Victoria and western New South Wales. Eastern areas are mostly dry, though offshore rain might brush coastal regions. Heavy downpours in Victoria are expected to reach northwest Tasmania. Western Australia stays fairly dry with inland thunderstorms, and the Northern Territories will see widespread showers, especially from Alice Springs to Darwin.

Monday sees similar conditions for the Northern Territories and Katherine, with thunderstorms also appearing in Queensland, but weakening as they move into New South Wales and Victoria. A cooler change will arrive in South Australia late Monday, ahead of a new high-pressure system moving into southern Western Australia. Thunderstorms are expected around the Kimberley. On Tuesday, a low-pressure system forms off the New South Wales coast, linking with rain and thunderstorms from Queensland to bring showers to the northeast corner of New South Wales. Colder southerlies will affect South Australia as high pressure moves east, bringing warmer weather to southwestern Western Australia. Tasmania, Victoria, and the ACT will experience showers, with the main rainfall focused on southeast Queensland and northeast New South Wales.

By Wednesday, the low deepens in the Tasman Sea, affecting Lord Howe Island. Wet weather remains along the coast as a southerly wind brings cooler temperatures to southern Queensland. Most of Australia will be dry due to the high-pressure system, but scattered showers are expected in South Australia, New South Wales, Victoria, and the west coast of Tasmania. The 7-day rainfall map shows significant wet weather for the Northern Territory, Queensland, and parts of New South Wales, with minimal rain for the ACT and eastern Victoria. Tasmania and South Australia will see heavy showers in some areas, and coastal showers will affect southwest Western Australia, the Kimberley, and the Top End. Overall, many dry areas will experience a much higher chance of wet weather.