
The most severe storm hit Meadow Springs in Mandurah, south of Perth, about 5:30pm on Sunday.
Duty forecaster at the Bureau of Meteorology James Ashley said a hot air mass combined with moisture in the atmosphere produced the stormy conditions.
"Everything in the atmosphere lined up perfectly," he said.
"We had a good upper-level disturbance move over the area and there was just enough moisture and lift to produce some really decent thunderstorms.













Comment: See also: Electric universe: Lightning strength and frequency increasing