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Adelaide and surrounding regions are in for a bout of thunderstorms beginning today and extending through Sunday as a gradually advancing pressure system from central Australia edges toward the east coast.
According to Jonathan How from the Bureau of Meteorology, “We anticipate this weather warning to be quite dynamic, expanding particularly over the weekend into eastern South Australia and extending towards western Victoria.”
This weather pattern could bring rainfall totals of up to 70mm within a six-hour period tomorrow, and potentially reach 80mm on Sunday.
In some areas, isolated rainfall could accumulate between 150mm and 200mm.
The Bureau of Meteorology has issued warnings for potential flash flooding, as the intense downpours are expected when a significant tropical low pressure system finally takes a southerly shift over the weekend.
The state’s south-east is likely to be affected, with flood warnings in place for the capital.
“Sunday night will be the main risk period for Adelaide and south-eastern parts of South Australia,” How said.
“Really, depending on where this trough and low-pressure system do sit, we can see Adelaide is on the edge of that heavier rain, but we could see flash flooding developing across the city as we head into Monday morning as well.”
How said that while the wet weather will be welcome for the dry parts of the state, it will also bring about new challenges.
“With heavy rain, that could lead to flash and river rain flooding and this could create dangerous travel, as well as driving conditions and number of roads and freight and trade lines are already impacted,” he said.
“For some parts of the south-east, this rain will be very welcome, particularly through western parts of Victoria and south-eastern parts of South Australia, but that will come with its challenges, including top soil, which may become washed away, as well as generalised flooding right across the region.”
How said the conditions will ease from Monday and then clear by Tuesday.
The system will move towards the east coast, affecting parts of Victoria and NSW.
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