How many millimeters of precipitation is always in the weather forecast? What is the concept of millimeter?

Precipitation refers to liquid or solid water falling from the sky to the ground. Precipitation has a great influence on the national economy, especially on agriculture. Too much precipitation is easy to cause floods, and if there is no precipitation for a long time, it will be dry. For Xinjiang with less precipitation, the lack of water resources seriously restricts agricultural production, so it is particularly important to carry out artificial precipitation enhancement.

Precipitation intensity division:

Light rain: rain with rainfall less than 2.5 mm within 1 hour or rain with rainfall less than 10 mm within 24 hours.

Moderate rain: 1 hour rainfall of 2.6-8.0mm or 24-hour rainfall of10.0-24.9mm..

Rainstorm: 1 hour rainfall 8.1-15.9mm rainfall or 25.0-49.9mm rainfall in 24 hours.