The Met Office has issued a thunderstorm warning for the Helensburgh and Lomond region.
The yellow warning is in place from 2am on Monday morning until 1pm the same day.
It says that thunderstorms may cause some disruption and damage to infrastructure during Monday.
The Met Office explained: "Thunderstorms are expected to develop over western parts of the UK and move northeast during the second half of Sunday night becoming organised into Monday morning.
"Although not all parts of the warning area are expected to see them, an area of increasingly organised thunderstorms is likely to produce a combination of frequent lightning, heavy rain, hail and short periods of strong winds.
"Some torrential downpours are likely, with 20-40 mm in places, and a potential for 40-60 mm of rain to fall in 1-2 hours very locally, with hail up to 2 cm in diameter. Thunderstorms are expected clear towards the northeast by Monday afternoon."
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