UPDATE 11.41am: A STRONG, fast moving cold front is moving across western parts of the South West Land Division and will extend east during the remainder of Thursday before conditions ease.
The cold front will impact Perth and Mandurah.
A second strong cold front is likely to affect the southwest of WA from early Friday morning.
Showers and isolated thunderstorms may produce damaging winds with gusts to 100 kilometres per hour and could cause damage to homes and property in the warning area until early Friday evening.
Damaging winds are likely over western parts of the warning area, exending to eastern parts during Thursday afternoon.
Conditions will ease over western parts of the warning area from mid to late Thursday afternoon and over the remainder of the warning area by early Thursday evening.
A second strong cold front will affect the southwest of WA during Friday, bringing possible damaging winds with gusts to 100 kilometres per hour over early Friday morning about Cape Leeuwin, extending to southwest of a line Perth to Bremer Bay by sunrise Friday and over much of the remaining South West Land Division by early afternoon.
Damaging winds with gusts to 100 kilometres per hour are also possible from mid Friday morning over the eastern Gascoyne, the Goldfields and eastern parts of the South West Land Division and the western Eucla well ahead of the second strong cold front.
A severe weather warning for this second strong cold front is likely to be issued during Thursday afernoon.
People in the southwest of WA experience a front as windy as this about 5 times a year.
Locations which may be affected include Albany, Bunbury, Busselton, Katanning, Mandurah, Manjimup, Margaret River, Mount Barker, Narrogin and Perth.
The following wind gusts have been recorded:
94 km/h at Busselton Jetty at 10:28 am.
93 km/h at Cape Leeuwin at 6:25 am.
93 km/h at Dardanup at 10:24am.
85 km/h at Cape Naturaliste at 6:32am.
83 km/h at Rottnest Island at 9:47am.
The Department of Fire and Emergency Services advises that people should:
* If outside find safe shelter away from trees, power lines, storm water drains and streams.
* Close your curtains and blinds, and stay inside away from windows.
* Unplug electrical appliances and do not use land line telephones if there is lightning.
* If boating, swimming or surfing leave the water.
* Be alert and watch for hazards on the road such as fallen power lines and loose debris.
* Keep away from flooded drains, rivers, streams and waterways.
* Be careful of fallen trees, damaged buildings and debris.
* Be careful of fallen power lines. They are dangerous and should always be treated as live.
* Assess your home, car and property for damage.
* If damage has occurred take photos and contact your insurance company to organise permanent repairs.
* If your home or property has significant damage, like a badly damaged roof or flooding, call the SES on 132 500.
The next Severe Weather Warning will be issued by 5:00 pm AWST Thursday.