Gusty showers, hail and even snow are on the cards midweek as a strong cold front sweeps through Western Australia, bringing chilly temperatures to the south of the state.

The Bureau of Meteorology (BOM) is forecasting the front to hit central and southern parts of WA on Wednesday, with freezing temperatures over the Stirling Range expected to deliver the strongest chance of snow so far this year.

"It's going to be fairly wet and blustery, indeed it will be very cold as well," BOM duty forecaster Shane Hicks said.

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"We've got quite a substantial pool of cold air coming up behind this system.

"We could see a broad area of small hail falling with this system as it rolls through on Wednesday, and perhaps even some snowfall up in the Stirling Ranges overnight Wednesday into Thursday morning."

With the temperature expected to dip to around 0 degrees Celsius in the Stirling Range, Mr Hicks said snow over Bluff Knoll was a real possibility, but it could be short-lived.

Sorry, this video has expired Quokkas frolic in snow on Bluff Knoll last August

"Of course it may wash away in the showers by [Thursday] morning unfortunately," he said.

"Perhaps there may be still a little bit to see in the morning, but it may have all melted and washed away by then."

The storm system is expected to bring showers with the chance of a thunderstorm, gusty winds and hail to Perth on Wednesday and into Thursday.

A minimum of 7C is expected on Thursday morning, followed by a top of 17C.

It's looking like an umbrella week in Perth with showers and possible storms on the way. ( ABC News: Greg Pollock )

Mr Hicks said the front would be widespread, possibly bringing thunderstorms, gusty winds and hail as far north as the Gascoyne and as far east as the Goldfields and Eucla.

"It will be quite a blustery front as it goes through, the showers and any thunderstorm activity associated with this system will be quite gusty," he said.

A severe weather warning for damaging winds and surf has been issued for an area south-west of a line from Kalbarri to Beacon to Merredin to Hopetoun.

Wind gusts of 100 kilometres per hour are possible and isolated gusts could reach 125kph.

The leading edge of the front is expected at the South West Capes at around 1:00am on Wednesday, before arriving in the Perth metro area at around 5:00am.

Perth forecast: