Forecast issued at 4:45 am WST on Thursday 29 September 2016.
Northern Western Australia
A strong high pressure ridge is developing over the south of the State. A trough develops over the western Pilbara during today and Friday, before moving eastwards over the weekend.
Southern and Central Western Australia
A deep low is moving into the eastern Bight, with a high pressure system moving in from the west. A weak front moves over southwestern parts on Friday, with a trough rapidly deepening through central parts of the State before moving eastwards. A stronger cold front moves through southern parts on Saturday. A high pressure ridge will develop over central parts of the State on Sunday.
Forecast for the rest of Thursday
Widespread areas of morning frost over inland parts of the South West Land Division and the Goldfields. Showers about the southwest Capes in the afternoon and evening. Possible morning showers near the Eucla coast. Afternoon showers and thunderstorms possible in the north Kimberley.
Friday 30 September
Isolated areas of morning frost over the Central Wheat Belt, inland Central West and Great Southern districts. Showers extending from the southwest in the morning to lie southwest of a line Geraldton to Southern Cross to Hopetoun by evening. Areas of rain extending through the Pilbara and into the North Interior and southwest Kimberley during the day. Afternoon showers and thunderstorms possible over the north and east Kimberley.
Saturday 1 October
Showers southwest of a line Shark Bay to Kalgoorlie, extending to southwest of Carnarvon to Eucla during the afternoon and evening. Thunderstorms and small hail possible over southern parts of the South West Land Division with gusty winds. Rain areas over the eastern Pilbara, southern Kimberley and northern Interior. Showers and thunderstorms over the northern and eastern Kimberley.
Sunday 2 October
Showers over southern parts of the South West Land Division and near the Eucla coast. with thunderstorms and hail possible near the south coast in the morning. Showers possible along the west coast south of Perth. Morning showers possible over the Central Wheat Belt and southern Goldfields. Rain areas over the southern Kimberley and northern Interior. Showers and thunderstorms possible over the remainder of the Kimberley.
The next routine forecast will be issued at 4:30 pm WST Thursday.