MUCH of the southern half of the state is in for bad weather on Wednesday.
A severe weather warning has been issued by the Bureau of Meteorology covering Perth, Jurien Bay, Mandurah, Bunbury, Busselton, Margaret River, Bridgetown, Northam, York, Narrogin, Katanning and Hopetoun.
Damaging winds and abnormally high tides are forecast for these areas as a result of a deep low pressure system.
Winds are expected to strengthen during the morning, with widespread damaging winds to 100km/h likely by the afternoon.
Dangerous gusts in excess of 125km/h could be experienced in isolated areas, with the possibility of significant damage or destruction to homes and property.
The strongest winds are expected during the afternoon and evening.
The worst affected areas are expected to be coastal parts between Perth and Augusta.
Tides are expected to rise above the normal high tide mark during Wednesday evening.
The Department of Fire and Emergency Services advises that people should prepare for dangerous weather and store or weigh down loose objects such as outdoor furniture.