What is the concept of 50 mm precipitation?

The meteorological department calls it rain and snow precipitation, and precipitation is called precipitation. The unit of precipitation is usually millimeters. 1mm precipitation refers to the water depth per unit area1mm.

Light rain refers to rain with the precipitation not exceeding10mm within 24 hours, ranging from 5mm to18mm,10mm to 25mm, moderate to heavy rain to18mm to 38mm, and heavy rain to 38mm to 75mm ... If the rainfall exceeds 50mm within 24 hours, it is called rainstorm; If it exceeds 100 mm, it is called a torrential rain; If it exceeds 200 mm, it is called rainstorm. ?

Extended data:

At present, tipping bucket rainfall sensor is the main tool for meteorological and hydrological rainfall measurement. This kind of measuring instrument will flow the received rainfall into a small bucket, and automatically dump it after reaching a certain amount, and at the same time form a corresponding rainfall record. 0. 1 mm tipping bucket rainfall sensor is used for meteorology and 0.5 mm for hydrology.

The tipping bucket rainfall sensor is an advanced measuring instrument, which can automatically generate rainfall records. They used to use rain cones and measuring cups. The diameter of the rain tube is generally 20 cm, and it is equipped with a funnel and a bottle. The measuring cup has a diameter of 4 cm and is used together with the rainfall tube. When measuring, pour the rainwater in the rainfall cylinder into the measuring cup, and the rainfall in the corresponding time period can be known according to the scale on the cup.

Baidu encyclopedia-precipitation