precipitation precipitation is any form of water that falls to the earth's surface. 1
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Precipitation
•Precipitation is any form of water that falls to the Earth's surface.
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Types of Precipitation
•The type of precipitation that falls to the ground depends upon the formation process and the temperatures of the environment between the cloud and the surface
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different types of precipitation?
•Rain•Snow•Hail•Sleet
•Freezing Rain
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Rain• Rain develops when growing cloud droplets become too heavy to
remain in the cloud and as a result, fall toward
the surface as rain4
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•Rain can also begin as ice crystals that collect each other to form large snowflakes
•As the falling snow passes through the freezing level into warmer air, the flakes melt
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Rain from snow!
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Snow
•Snow is formed when ice crystals form from water vapor that is in the clouds directly above your heads!
•This process is called sublimation
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Hail• Hail is formed
when updrafts carry raindrops upwards into extremely cold areas of the atmosphere
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Hail• There the
raindrops merge and freeze. When the frozen clumps get to heavy they fall to earth
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Hail
•Hail can vary in size, from the size of a small stone to that of a baseball! So be careful
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Sleet
•Sleet is frozen raindrops. Sleet begins as rain or snow and falls through a deep layer of cold air that contains temperatures below freezing that exist near the surface.
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Sleet
•Rain that falls through this extremely cold layer has time to freeze into small pieces of ice
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Freezing Rain
•Freezing rain is falling rain that cools below 0°C, but does not turn to ice in the air
•The water is “supercooled”
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Types of rainfall
What are the different types of rain and where do they happen?
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How it rains
1. Warm air rises
2. Air cools
3. Condensation
4. Clouds form
5. Rain16
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Types of rainfall
There are three types of rainfall:
1. Relief or Topographic
2. Convectional
3. Frontal17
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1. Relief Rain
2. Forced to rise over the mountains
1. Warm moist air from the sea
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3. Air cools as it is forced to rise
4. Condensation
5. Clouds form
6. Rain19
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Relief rain is quite common in Western Ghat where the high land areas are
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2. Convectional Rain
1. The sun heats the ground which heats the air
2. Warm air rises
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4. Air cools as it is forced to rise
5. Condensation
6. Clouds form
7. Rain22
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Convectional rain is common in the Rajasthan and Plain areas of India in Summer
It is also common in Equatorial region of the world along equatorial low pressure belt rgion everyday between 2 to 4 pm
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Convectional Rainfall
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3. Frontal Rain or Cyclonic
1. Mass of warm air meets a mass of colder air
2. Lighter warm air rises over heavier cold air in the temperate region along Warm and Cold front
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3. Warm air cools
4. Condensation
5. Clouds form
6. Rain26
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Frontal rain is very common all Temperate regions of the world
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