Wild winds, thunderstorms, heavy rain, and possible hail are forecast for Friday night. Picture: Daniel Wilkins Source: PerthNow
THE second part of a double-barrelled storm system will bring destructive winds, heavy rain and possible hail to Perth and the South West overnight.
The weather bureau is warning of thunderstorms, wild winds whipping up to 110km/h in parts, heavy rain and possible hail on Friday night.
It comes after a storm battered the metropolitan area and the South West in the early hours of Friday.
Friday night forecast
Cloudy. Scattered showers and isolated thunderstorms. Damaging winds possible. Possible hail and heavy falls. Winds westerly 30 to 40 km/h, decreasing to 25 to 30 km/h in the late evening.
Saturday forecast
Max: 19. Min: 9. Partly cloudy. Scattered showers contracting to the coast in the late afternoon. Isolated thunderstorms in the morning with possible hail and gusty winds. Damaging winds possible in the morning. Winds westerly 30 to 45 km/h tending southwesterly in the morning then becoming light in the late evening.
DFES warning
At 3:30pm the Bureau of Meteorology advises that a cold front lies just off the west coast with an associated deep low to the south of the state.
The front will move across the region this evening and the deep low will move towards the southern coastline towards sunrise on Saturday.
The passage of the front is likely to result in widespread damaging winds to 110 kilometres per hour that could result in damage to homes and property over an area west of a line Kalbarri to Dalwallinu to York to Bunbury extending to west of a line Kalbarri to Paynes Find to Hyden to Bunbury in the evening.
This system is likely to produce high sustained winds and frequent squalls with showers and thunderstorms.
Conditions are expected to ease towards midnight as the front moves inland and weakens but as the deep low approaches the south coast, showers and thunderstorms are again likely to produce widespread damaging winds to 110 kilometres per hour that could result in damage to homes and property over an area southwest of a line Gingin to York to Walpole between 4:00am and 10:00am.
Small hail is also possible with thunderstorms.
Large swells will lead to dangerous surf conditions which could cause significant beach erosion along the west coast south of Kalbarri.
SES crews kept busy
SES volunteers are on standby ahead of the oncoming severe weather.
The SES received 22 requests for assistance in the Perth metropolitan area caused by the Friday morning storm activity, including eight calls from Wanneroo and five from Mandurah.
The most significant damage was a patio blown off a house in Heathridge and a chimney collapse in Como.
Southern capes, Perth coast lashed by high winds
The South West capes and Perth coast were lashed by high winds early on Friday morning with Cape Leeuwin recording a maximum gust of 98km/h at 8.35am with consistent gusts up to 82km/h since about 6am.
Nearby Cape Naturaliste has also been buffeted by 50km/h-80km/h winds most of the night with a top gust of 78km/h at 8.40am.
Rottnest Island has been buffeted by gusts to 96km/h mid-morning after repeated gusts up to 85km/h from around 9.45am. Ocean Reef recorded a gust of 89km/h at 10.09am after an earlier 82km/h gust.
Mandurah was blasted by 65km/h wind gusts.
DFES warned residents in the south-west of corner of WA to prepare for dangerous weather last night.
See PerthNow weather for the latest live radar, storm warning and seven-day forecast
Mt William, in the Dwellingup state forest, had the state's highest fall with 36mm.
In the South West, most centres recorded 10mm to 20mm with Boyanup 23mm, Henty Brook 22mm, Collie 21mm, Witchcliffe 18mm and Busselton 15mm.
Rainfalls, between 5mm-12mm got through to the Great Southern, while farmers in the Central Wheatbelt got 5mm-10mm. Grain growers will by buoyed by recent rains which have revived hopes of a successful harvest.
RAINS ADD LITTLE TO DAMS
Despite heavy rains in the last two weeks, Perth's dam levels remain at their second lowest since 2006.
A Water Corporation spokeswoman said recent rains had made "minimal difference" to the dam levels, which currently sit at 155.66 gigalitres.
In 2011, the July dam levels were at their lowest since 2006, with just 149.27 gigalitres.
"The ground is just so dry, it's acting like a sponge, there's no run off," the spokeswoman said.
She said in the last few years, run off from winter rains had been so lacking, rainfall was no longer the primary water source for Perth which is why there had been such a large investment in desalination plants.
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