Damaging winds, heavy rainfall, flash flooding and large hailstones are forecast to impact Perth and the metropolitan area.
A severe thunderstorm alert issued for the Greater Perth area on Tuesday advises to find shelter away from trees, powerlines, storm water drains and streams.
Thunderstorms detected by the Bureau of Meteorology near Joondalup are moving south and will likely hit Perth by 5.10pm.
Wind speeds of up to 126 km/h was recorded at Kalannie at 4.17pm., the BOM said.
Satellite imagery also showed lightning activity associated with the thunderstorm.