Precipitation

Precipitation: is the name for water in liquid or solid form falling from clouds to the ground in rain, snow, or hail.

Sometimes precipitation also includes condensation products of water vapor directly formed on the ground, such as dew, hoarfrost, and freezing fog… Clouds, fog, mist, and smoke, are not called precipitation; meteorologists call the object of these observations a general term of meteorological phenomena.

The size of the cloud’s water droplets and ice crystals determines the precipitation conditions. They begin to fall when their size is large and heavy enough to overcome the updraft.

During the fall, through the thickness of the cloud, water droplets and ice crystals combine with smaller water droplets to increase their mass. Therefore, snow is often significantly from the types of cumulus clouds of falling raindrops.

In addition, the precipitation cloud depends on its colloidal stability, which is related to the physical structure of the cloud, i.e. the properties of the cloud components.

In the colloidal stability of a large shadow, when its essential elements are uniform in size and state, the probability of precipitation is less than in a cloud composed of water droplets and ice crystals of different sizes different size.

Classification of precipitation: According to the origin and rainfall characteristics, it is divided into three types: showers, regular, and drizzle.

Table 1: Common types of clouds for precipitation

Cloud type Precipitation	Middle floor As	Dance floor Ns	Floor area Sc	Floor St	Floor Cu	Dance – volume Cb
Rain (usually)	x	x			x	x
Drizzle			x	x
Snow	x	x	x			x
Shower						x
Hail						x

• Precipitation Observation Method: Precipitation is observed by measuring the thickness of the layer of water that has fallen from the clouds to a horizontal area on the ground.
  
  At weather stations, precipitation is calculated using an osmometer. It is a dedicated box placed on a stand in a precise place.
  
  The amount of rainfall, or the amount of snowfall after a period or after a period of observation, is measured with a glass measuring tube with divisions; each division is 2 cm3, which corresponds to a 0.1 mm high water column. The amount of snow is measured using a specialized ruler.
  
  The amount of precipitation is not measured on ships. Thanks to the radar, the movement and development of rain and related cloud systems can also be observed on the boat according to the brightness of the image on the screen – it tells about the intensity of the phenomenon. If the idea on the screen is clear, it was showers; the blurred vision is not clear – drizzle or fog.