What is light rain?

What are the precipitation terms in weather forecast?

The meteorological department calls rain and snow precipitation, and the amount of precipitation is called precipitation. The unit of precipitation is usually millimeters. 1 mm precipitation means that the water depth per unit area is 1 mm.

/kloc-how much of the 0/mm precipitation fell into the fields? As we know, the area per mu is 666.7 square meters, so the precipitation of 1 mm is equivalent to an increase of 0.667 cubic meters of water per mu, and the water per cubic meter is 1 000 kg. In this way, the precipitation of 1mm is equivalent to pouring about 650kg of water per mu. According to the measurement, the rainfall of 5 mm can make the dry land soak for 3 ~ 6 cm.

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 rain in which the precipitation does not exceed 10mm within 24 hours, ranging from moderate rain 5-18mm, moderate rain10-25mm, moderate rain18-38mm, heavy rain 25-50mm, and heavy rain 38-75mm, 24.

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 0.1mm. "Sometimes it rains" means that the weather is gloomy and sometimes there will be short-term precipitation. "Rainfall" means that in summer, the beginning and end of precipitation are all sudden, one is big, the other is small, and the rainfall is heavy.