What does the weather forecast say about rainfall?

The weather forecast looks at rainfall in this way: according to China Meteorological Bureau, rainfall below 10mm is called light rain,10 ~ 24.9mm is moderate rain, 25 ~ 49.9mm is heavy rain, 50 ~ 99.9mm is rainstorm, and100 ~ 250mm is rainstorm.

According to meteorology, the so-called rainfall is the depth at which rain falls to the horizontal plane (no leakage, evaporation, loss, etc.). ) within a certain period of time. Rainfall is calculated by the rain gauge and expressed by the depth of rain collected on a plane with an accuracy of 0.25mm or 0.0 1_. It is sometimes expressed in liters per square meter (1Lm-2= 1mm). In meteorological statistics, rainfall can also be called rainfall, that is, the accumulated precipitation in a certain period of time, in which if the precipitation is less than 0. 1 mm, it is regarded as rain trace.