There is light rain, moderate rain and heavy rain, so how to divide the thunderstorm level?

In the weather forecast issued by the meteorological department, we often hear professional terms such as light rain, moderate rain and heavy rain. What's the difference between them?

Light rain refers to the rain in which the precipitation does not exceed 10 mm within 24 hours.

Small to moderate rain refers to rain with a precipitation of 5 mm ~ 18 mm within 24 hours.

Moderate rain refers to the precipitation within 24 hours 10 mm ~ 25 mm rain.

Moderate to heavy rain refers to the precipitation within 24 hours 18 mm ~ 38 mm rain.

Heavy rain refers to rain with a precipitation of 25 mm to 50 mm within 24 hours.

Heavy rain refers to the rain with a precipitation of 38 mm to 75 mm within 24 hours.

Heavy rain occurs when the rainfall exceeds 50 mm in 24 hours.

If the rainfall exceeds 100 mm within 24 hours, it is called rainstorm.

If the rainfall exceeds 200 mm in 24 hours, it is called a torrential rain.

In weather forecast terminology, different expressions have different meanings. For example, "sporadic light rain" means that the precipitation time is very short, and the precipitation does not exceed 0. 1 mm. "Sometimes there is light rain" means that the weather is gloomy and sometimes there is short-term precipitation. "Rainfall" refers to the sudden start and end of summer precipitation, one big and one small, with heavy rainfall. "Thunderstorm" means a shower accompanied by thunder and lightning. "There is rain in some areas" means that precipitation occurs in a small area and its distribution is irregular.