A surface trough is working its way through inland parts of Western Australia, bringing areas of widespread showers and possible thunderstorms to much of the state throughout the week. Severe thunderstorms are possible on Tuesday afternoon, mainly for areas to the north of Perth. On Wednesday, severe thunderstorms are possible for parts of the Gascoyne, and extending down to the Perth area, which may bring heavy rainfall, damaging wind gusts and large hail. The area of storms is expected to move