The Bureau of Meteorology is warning severe weather conditions could cause widespread damage in parts of WA as two fronts approach the state.
The bureau is predicting winds similar to a category two cyclone from Perth through to Albany tomorrow.
The storm is expected to bring conditions seen only seen every four or five years in the south-west.
A separate system is forecast to hit the state's north-west tonight.
Heavy rain and thunderstorms are forecast for between Exmouth and Geraldton and will move to the Gascoyne and Goldfields tomorrow.
Emergency services are urging people to prepare their homes for the severe weather.
© ABC 2013
12:13 EDT Transition season is well under way across northern Australia with thunderstorms a regular occurrence each afternoon.