How does the weather forecast divide the rainstorm?

Rainfall: refers to the total amount of rain, snow, hail, etc. Dew, frost, etc falling from the atmosphere. Condensed by water vapor, in millimeters.

Rainfall intensity: refers to the rainfall per unit time. In millimeters per minute or millimeters per hour. The rainfall intensity standards generally adopted by meteorological departments in China are: light rain: 12 hours with rainfall less than 5 mm, or 24 hours with rainfall less than 10 mm; Moderate rain: the rainfall within 12 hours is 5- 14.9mm, or the rainfall within 24 hours is10-24.9 mm; Rainstorm: 12 hour rainfall 15-29.9mm, or 25-49.9mm within 24 hours ... The quantitative standard of rainstorm varies from place to place, depending on the specific situation. Meteorologically, rainstorm is roughly divided into three levels according to its intensity: rainstorm: 12 hour rainfall is equal to or greater than 30mm, or 24-hour rainfall is equal to or greater than 50mm rainstorm: 12 hour rainfall is equal to or greater than 70 mm, or 24-hour rainfall is equal to or greater than 100 mm; Extraordinary rainstorm: 12 hour rainfall is equal to or greater than 140mm, or 24-hour rainfall is equal to or greater than 250mm.