The Bureau of Meteorology is warning WA residents of an extremely strong cold front and deep low-pressure system that are set to impact southern parts of the state this weekend.
The system is set to lash Perth with areas of heavy rain on Saturday, along with severe storms.
Senior Meteorologist Sarah Scully says gusty thunderstorms could bring damaging to locally destructive winds of more than 125km/h, coastal hazards and even a risk of tornadoes on Saturday night.
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"This risk is expected to continue through until Sunday morning, and any tornadoes that do form will be very short-lived and very difficult to track," Scully said.
The impacted area may expand over the weekend as it's an "evolving weather situation", the bureau says, but the affected zone currently extends from Kalbarri down to Bunbury, including Perth, which is set to see damaging to locally destructive winds, meaning wind gusts in excess of 125 km/h.
Once those pass though, there's another wave of strong winds to be wary of, she added.
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"The strongest winds are expected with [a] low-pressure system that will push up into the south-west during Sunday evening," Scully said.
"Widespread destructive winds are expected to extend about the west coast and pushing into the south-west, where they will continue through until the early hours of Monday morning before that low-pressure system tracks into the bight, with the winds easing across the south-west and instead concentrating through the south coast."
The warning for the west coast of Australia comes after the cancellation of a severe storm warning over on the east coast, where heavy rain and storms hammered parts of the country.
The Queensland and NSW coasts, as well as regions further inland, copped a soaking this week, driven by a low-pressure system off the coast.
Falls of up to 80mm were recorded in south-eastern Queensland, and up to 70mm in NSW down to the Central Coast, with the storm warning covering the Mid North Coast, Hunter, North West Slopes and Plains, and Northern Tablelands districts.
Weatherzone's lightning detector showed 460,000 strikes within 800km of Dalby in southern Queensland in the 24 hours to 9am yesterday.
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By the weekend, the forecasts for both Brisbane and Sydney show sunshine ahead, with temperatures peaking in the low 20s.
But on Saturday, another cold front will approach the south-east of the country.
As a result, showers will increase for South Australia, Victoria, Tasmania and inland parts of New South Wales, with colder southerly winds coming up behind that system.