Residents in the Mandurah and Rockingham areas can expect some wet, cold weather on Good Friday.
Possible thunderstorms and hail are forecast for the region, bringing between 15mm and 30mm of rain.
The maximum is expected to reach just 15 degrees, the coolest April temperature in Mandurah on record.
Conditions will ease slightly on Saturday with a 70 per cent chance of showers, most likely in the morning, gusty winds and possible hail.
The temperature is forecast to reach 17 degrees.
Motorcycle passenger in critical condition after rider allegedly runs red light in East Rockingham
Two men charged over Australind murder
Last call for donations to support Mandurah's homeless
State Government commits to building $5 million electrical training facility at Rockingham TAFE
McDonald's approved for Dawesville
Wanted man known to frequent Kwinana, Mandurah and Rockingham areas
Mandurah woman completes grueling English Channel swim
Man and child seriously injured in South West crash
Motorists warned to expect delays during Kwinana Freeway upgrades