The Met Office has issued a weather warning for potential thunder, lightning and floods for Tayside.
The forecaster has issued a yellow warning for parts of Angus and north-east Scotland, which is valid from 2am on Saturday until 2pm.
The warning says: “Thunderstorms will become more widespread across North East Scotland during the early hours of Saturday morning, perhaps merging into longer periods of heavy and thundery rain.
“Where the thunderstorms occur, torrential downpours are possible with 20 mm of rainfall in 1 hour and perhaps 30-40 mm in 2 or 3 hours. Large hail, frequent lightning and strong and gusty winds will be additional hazards.
“The thunderstorms will become less frequent and the risk of disruption will decrease on Saturday afternoon.”
It adds that flooding of a few homes and businesses is “likely”, leading to some damage to buildings or structures.
There will “probably some damage to a few buildings and structures from lightning strikes,” says the Met Office.
The warning continues: “There is a good chance driving conditions will be affected by spray, standing water and/or hail, leading to longer journey times by car and bus
“Delays to train services are possible. Some short term loss of power and other services is likely.”