Terminology of rainfall weather forecast

Different statements have different meanings. For example, "sporadic light rain" means that the precipitation time is very short, and the precipitation does not exceed 0. 1 mm. "Sometimes there is light rain" means that the weather is gloomy and sometimes there is short-term precipitation. "Shower" refers to the sudden start and end of summer precipitation, one big and one small, with heavy rainfall. "Thunderstorm" means a shower accompanied by thunder and lightning. "There is rain in some areas" means that precipitation occurs in a small area and its distribution is irregular.

Meteorology has strict regulations on snowfall, which is completely different from the standard of rainfall. Snow quantity is a measure measured by meteorological observers after melting the collected snow in a certain standard container. There are strict regulations on snowfall in meteorology. Like rainfall, it refers to the amount of snowfall in a certain period of time. There are different standards for 24 hours and 12 hours. In weather forecast, it is usually to forecast the weather during the day or at night, mainly referring to the precipitation of 12 hours.

Standard of snowfall at each base:

Sporadic light snow refers to the snowfall but less than 0. 1 mm;

Xiaoxue: greater than or equal to 0. 1 mm and less than1.0mm;

Medium snow: 1.0mm less than 3.0mm.

Heavy snow: greater than or equal to 3.0 mm and less than 5.0 mm;

Blizzard: snowfall is greater than or equal to 5.0mm. ..

Snowfall refers to the depth of snow converted into the same amount of water, which can be converted into the thickness of snow according to the ratio of 1: 15. In this way, the snowfall of 97.7mm is about 1.5m thick snow.

Definition: refers to the depth at which liquid or solid (after melting) water falls from the sky to the ground without evaporation, infiltration and lossless accumulation on the horizontal plane. Precipitation is in millimeters, and meteorological observation takes one decimal place. Classification: Meteorological Department: Rainfall refers to the depth of the water layer that falls to the ground within a certain period of time, in millimeters. The rainfall per unit time is called rainfall intensity. Rainfall intensity is classified according to rainfall grade. Flood control department: Rainfall is the depth of water layer falling on the ground at a certain point or a certain unit area in a certain period of time, calculated in millimeters. According to the provisions of the Flood Control Manual of the National Defense Office, any 24-hour cumulative rainfall exceeding 50 mm is designated as a rainstorm. Related concepts: Weather forecast is called rain and snow precipitation, and precipitation is called precipitation, and the unit of precipitation is usually millimeters. 1mm precipitation refers to the water depth per unit area1mm. 1mm How much precipitation falls into the fields? The area per mu is 666.7m2, so the precipitation of 1mm is equivalent to an increase of 0.667m3 of water per mu. Every cubic meter of water is 1000 kg, so the precipitation of 1 mm is equivalent to watering about 650 kg of water per mu. According to the measurement, the rainfall of 5 mm can make the dry land soak 3 cm to 6 cm. In the weather forecast issued by the meteorological department, there are some professional terms such as light rain, moderate rain and heavy rain. The difference between them is: light rain refers to the rain with the precipitation not exceeding10mm within 24 hours, with the range of 5mm to16.9mm as moderate rain,10mm to 24.9mm as moderate rain, and17mm to 37. If the rainfall exceeds 50 mm in 24 hours, it is called rainstorm; If it exceeds 100 mm, it is called a torrential rain; If it exceeds 250 mm, it is called rainstorm. Weather forecast terms: 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. 1 mm. "Sometimes there is light rain" means that the weather is gloomy and sometimes there is short-term precipitation. "Shower" refers to the sudden start and end of summer precipitation, one big and one small, with heavy rainfall. "Thunderstorm" means a shower accompanied by thunder and lightning. "There is rain in some areas" means that precipitation occurs in a small area and its distribution is irregular. Meteorology has strict regulations on snowfall, which is completely different from the standard of rainfall. Snow quantity is a measure measured by meteorological observers after melting the collected snow in a certain standard container. There are strict regulations on snowfall in meteorology. Like rainfall, it refers to the amount of snowfall in a certain period of time. There are different standards for 24 hours and 12 hours. In weather forecast, it is usually to forecast the weather during the day or at night, mainly referring to the precipitation of 12 hours. Standard of snowfall at each base: Sporadic light snow refers to snowfall with a certain amount but less than 0. 1 mm; Xiaoxue: greater than or equal to 0. 1 mm and less than1.0mm; Medium snow: 1.0mm less than 3.0mm Heavy snow: 3.0mm or more and 5.0mm or less; Blizzard: snowfall is greater than or equal to 5.0 mm .. snowfall refers to the depth of snow converted into equivalent water, which can be converted into the thickness of snow according to the ratio of 1: 15. In this way, the snowfall of 97.7mm is about 1.5m thick snow.