What is the sign of light rain?
The rainfall of rainwater is classified according to the depth of rain falling on the horizontal ground (assuming no leakage, evaporation, loss, etc. ) in a certain period of time.
Daily rainfall is the total rainfall of an area within 1 day. In addition, there are annual rainfall, monthly rainfall and how many hours of rainfall. If the daily rainfall is accumulated, the ten-day rainfall, monthly rainfall and annual rainfall can be obtained respectively. Secondary rainfall refers to the total amount of continuous rainfall from the beginning to the end of a certain rainfall.
Rainfall is measured by rain gauge or rain gauge, and the unit is millimeter.
Rainfall observation can be divided into four types: 24 segments (1h), 8 segments (3h), 4 segments (6h) and 1 segment (24h).
Extended data
Rainfall classification
Light rain: 1d (or 24h) rainfall is less than 10mm.
Moderate rain: 1d (or 24h) rainfall 10 ~ 25mm.
Rainstorm: 1d (or 24h) rainfall is 25 ~ 50mm.
Rainstorm: 1d (or 24h) rainfall 50 ~ 100mm.
Rainstorm: 1d (or 24h) rainfall 100 ~ 200mm.
Heavy rainstorm: 1d (or 24h) rainfall is more than 200mm.
Light snow: the snowfall process in which the snowfall is less than 1.0mm within 12 hours (equivalent to melting rainfall, the same below) or less than 2.5mm within 24 hours.
Medium snow: 12 hour snowfall1.0 ~ 3.0mm, or 24-hour snowfall of 2.5 ~ 5.0mm or snow depth of 3cm.
Heavy snow: the snowfall process in which the snowfall is 3.0 ~ 6.0mm in 12 hour or 5.0 ~10.0mm in 24 hours or the snow depth reaches 5cm.
Blizzard: A snowfall process in which the snowfall is more than 6.0 mm within 12 hours or more than 10.0 mm within 24 hours or the snow depth reaches 8 cm.
Heavy snowstorm: the snowfall is more than 12.0 mm in12 hours or more than 20.0mm in 24 hours or the snow depth reaches 16CM.
Extraordinary snowstorm:/kloc-a snowfall process in which the snowfall is more than 24.0 mm in 0/2 hour or more than 40.0 mm in 24 hours or the snow depth reaches 32 cm.
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