A severe thunderstorm warning has been issued for the Gascoyne, Goldfields, Eucla and South Interior forecast districts.
The storm could bring damaging wind, large hail and heavy rainfall.
The weather warning is for people in parts of WA in an area bounded by Eyre to Kalgoorlie to Meekatharra to Newman to Carnegie to Eyre, including Kalgoorlie and surrounding areas.
Large hail has already been reported in Coolgardie.
The overall weather pattern is not unusual for this time of year, but severe weather may occur in some parts of the warning area.