A strong cold front is expected to move over the south-west of WA tomorrow bringing thunderstorms and gusty winds.
The storm will bring a period of heavy rainfall to western parts of the South West Land Division.
Showers and thunderstorms with peak gusts about 125km/h are forecast for the Lower West forecast district and parts of the Central West and South West forecast districts.
Abnormally high tides which may cause sea water flooding of low lying areas are forecast for the Central West and Lower West forecast districts and parts of the South West forecast district.
The weather warning is for people in parts of WA southwest of a line from Kalbarri to Morawa to Dwellingup to Windy Harbour.
This includes people in, near or between the following towns: Geraldton, Northampton, Jurien Bay, Mandurah, Bunbury, Bussleton, Margaret River and Bridgetown and the Perth Metropolitan area.