Weather on the way: BoMBy Catherine Clifford, Thursday July 18, 2013 - 21:50 EST
The Bureau of Meteorology says rain is about to arrive in the weather districts of the North West Slopes and Plains and Northern Tablelands.
Forecaster, Olenka Rudewych, says a cold front is moving across the region on Friday and Saturday.
Rain will develop over the North West Slopes and Plains early Friday, with rain extending over the Tablelands by Friday afternoon.
She says reasonably good rain is expected.
"There'll be widespread falls of around 10mm to 20mm over the North West Slopes and Plains, with locally heavier falls around the 30mm to 40mm mark in thunderstorms, in particular," she said.
"The Northern Tablelands should see around 5mm to 10mm for Friday, but mainly in the Western parts of the district."
Ms Rudewych says the system will be short-lived.
"The cold front will move through fairly quickly, bringing a sudden drop in temperatures," she said.
"But the weather will start to clear on Sunday."
© ABC 2013
More breaking news
Labor, Greens slam Agriculture White Paper for lack of strategic vision or climate change consideration
Prime Minister Tony Abbott says his government "wants to back people who are prepared to back themselves", and that a newly released vision for Australian agriculture will do just that.
Queensland has had more than its share of severe flood events in recent years, yet despite authorities' repeated warnings, drivers have continued to cross flooded roadways.
A Royal Flying Doctor Service aircraft has been forced to land on Rottnest Island with two patients on board because of the thick fog in Perth.