Forms of Precipitation
By: Flavio Gutierrez
Precipitation
• Any product of condensation of atmospheric
water vapour
• Main forms of Precipitation:
– Rain
– Snow
– Hail
– Sleet
Humidity
• Relative Humidity
– Amount of Water Vapor
in the air
• Dew Point
– Water condenses at
ground level
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4 ways that causes air to rise
• Orographic Lifting
– Air is forced to rise over a
mountainous barrier
• Frontal Wedging
– Warmer, less dense air is
forced over cooler denser air
• Convergence
– Pile-up of horizontal airflow
resulting in an upward flow
• Localized Convective Lifting
– Unequal surface heating
causes localized pockets of air
to rise
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Basis of Cloud Formation
• Adiabatic Temperature
– 10°c per 1000 meters
• Adiabatic Cooling and Condensation
– Occurs when air is uplifted from the surface
Types of Precipitation
• Rain
– Liquid water in a form of
droplets
– Most Common
• Snow
– Crystalline water ice
• Hail
– Big ball of ice
• Sleet
– Small translucent ball of ice
– Ice pellets
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References
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https://en.wikipedia.org/wiki/Ice_pellets
https://en.wikipedia.org/wiki/Humidity#/search
https://en.wikipedia.org/wiki/Hail#/search
https://en.wikipedia.org/wiki/Snow
https://en.wikipedia.org/wiki/Rain
http://www.easttennesseewildflowers.com/gallery/var/albums/weather/Precipitati
on_types.jpg?m=1348919385
https://upload.wikimedia.org/wikipedia/commons/8/83/Cloud_forest_mount_kinal
abu.jpg
https://answers.yahoo.com/question/index?qid=20110809031203AAIwdnc
http://study.com/academy/lesson/what-is-humidity-definition-measurementseffects.html
http://www.earthonlinemedia.com/ebooks/tpe_3e/atmospheric_moisture/condens
ation_process.html
http://geogrify.net/GEO1/Images/Geosystems/EG_7e_Figure_05_23c_L.jpg
https://en.wikipedia.org/wiki/Precipitation
QUIZ
• WHAT ARE THE FOUR MAIN FORMS OF
PRECIPITATION?
• WHAT IS THE MOST COMMON FORM OF
PRECIPITATION IN THE PHILIPPINES