A severe weather warning for Perth and Western Australia's Goldfields-Midlands region has been cancelled but remains in place for the state's south where the first significant cold front of the year could bring snow.
Strong winds in the early hours of Friday ripped the roof off a house on Shorehaven Boulevard in Alkimos on the city's northern fringe.
The owners were not home.
Other less serious damage was reported across the metropolitan area, where debris including tree branches was blown into power lines, knocking out supply to thousands of properties.
Just after midday, about 330 properties were still without power while the State Emergency Service had received more than 40 requests for help.
The most powerful gusts of 91km/h were recorded on Rottnest Island and Garden Island off the Perth coast at 1am and 4am, respectively.
Wave heights of up to five metres were recorded at Albany and Cape Naturaliste at 10am.
A severe weather alert remains in place for parts of the South West, Lower South West and Great Southern.
Gusty showers with possible thunderstorms and small hail are expected to continue in Perth through Friday, but damaging winds are now only likely over areas southwest of a line from Bunbury to Katanning to Bremer Bay.
The Bureau of Meteorology has forecast well-below average temperatures, with possible snow flurries on the Stirling Range on Friday evening and Saturday morning.
"It's certainly cold enough - it's more likely to happen tonight," a BOM spokesman told AAP.
"Anything would be very short-lived."
Snow falls an average of 1.7 times per year on Bluff Knoll, the highest peak of the Stirling Range.
The snowiest year on record was 2016 when the peak was dusted six times.
