The Bureau of Meteorology (BOM) said the system will deliver some wintry weather to south-western parts of the state, and is expected to arrive in Perth overnight.
“We’re expecting a rain band ahead of a cold front to reach the Perth metro area around midnight, potentially just after that, and then we should see areas of persistent rain through to the morning, around 8:00am or 9:00am,” forecaster Cameron Lewis said.
“Then it should start to transition into more showery weather with the potential for isolated thunderstorms.”
While gusty showers are forecast southwest of a line from Coral Bay to Israelite Bay, east of Esperance, the heaviest rain is expected between Perth and Bunbury, with 20 to 40 millimetres forecast.
As a crippling drought grips the eastern states of Australia, Perth has experienced its wettest winter in years and is on the verge of recording its strongest August rainfall since 1992.
Perth has received 146.6mm of rain so far this month and needs another 30mm to exceed the 2004 total of 175.6mm.
“From there it will need an extra 15mm or around about 45 in total to try to get over what we got back in 1992,” Mr Lewis said.
With more showers forecast for Perth on Wednesday, that is shaping up as a real possibility.
Perth’s cumulative rainfall for the year is also tracking above average.
A 96.2mm deluge on January 16, courtesy of the remnants of ex-Cyclone Joyce, gave the city a head start, and helped offset the dry autumn.
The Bureau of Meteorology is predicting spring to be drier than average in the south-west of WA…