A large-scale rain band is set to reach havoc as it sweeps towards Queensland this week, with some areas in Central Australia forecast to be dumped with “more than a month’s worth of rain” in just days.
Sky News meteorologist, Bradlyn Oaks warned of a possible “unseasonable” deluge of isolated daily totals of up to 150mm in certain parts of the Northern Territory before the rainband hits Queensland from the weekend.
Although Ms Oaks stressed that there was “a lot of model variation here on exactly where the highest accumulation will be”, she forecast stormy conditions and a lot of “wet weather conditions”.
Early weather forecasts show the potential for heavy rainfall in the interior areas of Queensland from Saturday and Sunday before intensifying in the beginning of next week.
Ms Oaks said areas in the eastern part of Queensland could receive daily totals of 100mm.
The Bureau of Meteorology issued another severe weather update on Tuesday.
Meteorologist Miriam Bradbury said “reasonable falls” were recorded, with 70mm in Western Australia’s Fitzroy River catchment and 50mm in Ernabella in South Australia.
Ms Bradbury said the secondary rainband would likely intensify from Friday onwards, “pushing back into the Kimberleys,” while also “potentially bringing impacts to the north tropical coast (in Queensland) through the early part of next week as well”.
“We’re not necessarily expecting downbursts of heavy to intense rainfall with this system, it’s more going to be steady rain that accumulates over hours or days,” she said.
“What makes this system significant is the duration of the event, stretching all the way through the weekend, and the extensive rainfall across the country.
“It’s expected to have widespread impact on roads and access routes with potential flooding.”
South of the border, NSW could also expect patches of intermittent rain.
The bureau has forecast a shower or two for Sydney on Wednesday (up to 7mm) and Thursday (up to 3mm).
Showers were also expected on Monday and Tuesday, with rainfall totals of up to 10mm.
In Perth, temperatures plummeted to just 0.7C on Tuesday morning, with the capital city reporting its coldest morning since June 13, 2016.
Just sightly more inland, Perth airport reported temperatures of -0.6C, the coldest morning since July 25, 2012.
South Australians continue to be under “watch and act” orders from the State Emergency Service.
The bureau has issued a flood watch alert for parts of the Flinders, North West and North East Pastoral districts, with fears the rain could intensify throughout Tuesday before contracting on Wednesday.
Affected catchments include Flinders Ranges rivers and creeks, the Simpson Desert, Lake Eyre, Warburton River, Finke River and Stephenson Creek, Eastern Great Victoria Desert, and Warburton District Rivers.
While catchments were dry ahead of the rainfall, the bureau warned there might be rises in local creeks and over-bank flooding, with roads likely affected.
Originally published as Qld weather: Early weather warning of 100mm daily rain totals
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