Perth weather: Another two days of downpours loom for the city

Days after Perth was battered by a storm packing 100km/h winds that twisted metal in Scarborough and lifted off roofs, the city can expect another deluge over the next two days.

Up to 20mm of rain is forecast for Friday, as showers increase through the day.

The rain will continue into Saturday, when up to 10mm may fall - most of it expected in the morning.

If all of that arrives, Perth will have received more than half of its average rainfall for August in the month’s first four days.

The metropolitan gauge had 42mm in it for the month up to 6pm Thursday night and the August average is 123.6mm.

The SES was in strong demand through Wednesday as a cold front crossed the coast, destroying shop fronts in Scarborough, peeling roofs off houses in Two Rocks, toppling a 20m tree in Mirrabooka and sweeping up a carport roof in Inglewood.

Rain opened up a one-metre pothole on Reid Highway, where up to 60 drivers copped flat tyres, and Rockingham resident Karla Armstrong found two chimneys on her roof.

They weren't hers and the tiles had been ripped off her own house.

“Me and my mum had buckets, towels all throughout the house...all down there,” she told 7 News Perth.

In some areas, like Gooseberry Hill and Rottnest, temperatures felt sub-zero because of the wind chill.

And then, of course, there was the abundance of snow that fell in the Stirling Ranges and on Bluff Knoll.

The Bureau of Meteorology described it as the coldest front of the year so far and it has helped create ideal conditions for this weekend’s Avon Descent.

The skies will clear for Sunday’s second Western Derby of the seasons between Fremantle and West Coast but the rain is forecast to return mid-week.

Perth’s outlook

Friday: showers increasing, 8-20mm, 19 degrees

Saturday: showers easing, 5-10mm, 16 degrees

Sunday: cloudy, 16 degrees

Monday: cloudy, 18 degrees

Tuesday: showers, 2-4mm, 19 degrees

Wednesday: showers increasing, 10-15mm, 19 degrees

Thursday: shower or two, 5-10mm, 16 degrees.