People living along the coast between Jurien Bay down to Albany, inland out to Northam, Narrogin and Katanning, plus those in between are being told to prepare for another wild storm to hit Monday morning.
Showers and thunderstorms are expected to fall from around 9am and could continue into the early afternoon.
The front is expected to produce damaging winds up to 100km/h which could cause damage to homes and properties, while some isolated areas could see wind gusts up to 125km/h.
Affected areas include Albany, Bunbury, Katanning, Mandurah, Manjimup, Margaret River, Moora, Mount Barker, Narrogin, Northam and the Perth metro area.
It’s the second serious storm to hit the southern half of WA in the space of a week.
On Thursday afternoon, parts of the South West, South Coast and Great Southern saw very strong winds and decent rainfall.
Northcliffe picked up nearly 37mm from 9am Thursday to 9am Friday, while places like Busselton Jetty, Cape Leeuwin and Cape Naturaliste had several wind gusts close to or over 100km/h.
The Department of Fire and Emergency Services (DFES) is telling people to prepare now to reduce any possible damage to your home or property.
Store or weigh down loose objects around your home like outdoor furniture that could be picked up and thrown by strong winds, causing damage or injury
Ensure your emergency kit is complete including a battery operated radio, torch, spare batteries and first aid kit
Ensure pets and animals are in a safe area
Move vehicles under cover
Boat owners should securely moor their boats
Campers should find safe shelter away from trees, powerlines, storm water drains and streams
Unplug electrical appliances and avoid using landline telephone if there is lightning.
If you are away from home contact family or friends to prepare your property