How long does a thunderstorm usually last?

An hour to three hours. Thunderstorms usually last for one to three hours. Details are as follows:

1 is a thunderstorm with general intensity, usually about one hour.

2. If it is strong convective weather such as thunderstorm, gale and hail, it usually lasts for about 3 hours. The most common flood in the rainy season in southern China usually begins with this thunderstorm, and then turns into continuous heavy rainfall after the thunder gradually leaves.