What does 50 mm precipitation mean?

50 mm precipitation refers to heavy rain. The weather and meteorological department calls 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.

I. Rainfall:

Rainfall means that the rainwater falling on the ground is not evaporated, infiltrated and lost, but is determined by the depth of accumulation. The unit of depth stipulated in our country is millimeter. The level of rainfall is divided into light rain, moderate rain, heavy rain, heavy rain, heavy rain and heavy rain according to the rainfall within 24 hours.

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.

Second, the form of precipitation:

According to different physical characteristics, precipitation can be divided into liquid precipitation and solid precipitation. Liquid precipitation includes rain, rainstorm, thunderstorm, freezing rain and showers in Mao Mao. Solid precipitation includes snow, hail and graupel. And liquid-solid mixed precipitation such as sleet.

Three, China Meteorological Bureau regulations:

The rainfall within 24 hours is called daily rainfall, as long as the daily rainfall is below10mm, it is called light rain,10.0 ~ 24.9mm is moderate rain, 25.0 ~ 49.9mm is heavy rain, 50.0 ~ 99.9mm is heavy rain, and100.0 ~ 250.0mm is heavy rain.