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Precipitation Reference Libraries

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Condensation
2009-07-06 16:28:37

Condensation is the change of the physical state of matter from a gaseous form into liquid form. When the transition of matter happens from gaseous to solid directly, it is known as deposition. Condensation occurs when a vapor is cooled or compressed to its dew point. Water vapor that naturally condenses on cold surfaces into liquid is called dew. Water vapor will only condense on another...

White Frost
2009-07-06 16:20:02

White frost is a type of solid ice that forms directly from water vapor found in the air. White frost forms when the humidity is above 90% and the temperature is below 18 degrees Fahrenheit. White frost grows against the wind, since the facing winds have higher humidity than leeward air. The wind must be light or the delicate icy structures become broken. The structures have big, interlocking,...

Soft Rime
2009-07-06 16:09:35

Soft rime is a type of milky white ice that forms when water droplets in light freezing fog freeze to the outer surfaces of objects. This formation usually occurs with light winds or in calm conditions. The rime forms to the windward (side facing the wind) side of solid objects. Soft rime is similar in appearance to hoar frost, but is formed differently. Soft rime is formed when vapor first...

Hard Rime
2009-07-06 15:49:33

Hard rime is a type of white ice that forms when water droplets found in fog freeze to the outer surfaces of objects. Hard rime is most often found on trees atop mountains and high ridges in winter, when low clouds cause freezing fog. This fog freezes along the windward (sides facing the wind) side of trees, buildings, and any other solid objects. The air temperature needed for hard rime to...

Rain
2009-07-04 16:31:47

Rain is a type of liquid precipitation. It is defined as condensation of atmospheric water vapor that forms into drops that become heavy enough to fall, and often making it to the surface. Rain is the primary source of most of the fresh water in the world. Rain provides suitable conditions for diverse ecosystems, water for power sources and for crop irrigation. Not all rain reaches the surface....

Clear Ice
2009-07-04 15:43:10

Clear Ice refers to a solid precipitation that forms when air temperature is between 32 degrees and 27 degrees Fahrenheit and there is a presence of super-cooled, large drops of water (from freezing fog). A rapid build up and slow dispersing of latent heat of fusion favors conditions for the formation of the transparent ice. A similar phenomenon occurs when freezing rain or drizzle hit's a...

Nimbostratus
2009-07-04 15:37:27

Nimbostratus clouds are distinguished by a formless cloud layer that is predominantly dark gray in color. "Nimbo" comes from the Latin word "nimbus", meaning rain. It is a cloud that produces rain, and develops a cloud base between the surface and 10,000 feet. These clouds normally have a thickness of 6,500 to 10,000 feet, but can range from 3,500 to 15,000 feet. In rare cases, nimbostratus can...

Stratus
2009-07-04 15:24:37

A Stratus cloud is a cloud belonging to a class distinguished by horizontal layering with a uniform base. This type of cloud is different from other clouds that are usually taller than they are wide (these are known as cumulus clouds). The term "˜stratus', In Latin, means layer or blanket. Stratus clouds are flat, featureless clouds of low altitude that can vary in color from dark gray to...

Cirrus
2009-07-04 15:10:05

Cirrus clouds are thin wisplike strands, sometimes accompanied by patches. Their shape and arrangement lead to their common name of "mare's tail". These clouds can be so extensive that they are virtually identical to one another and hard to tell apart. Sometimes high altitude convection produces another form of cirrus called cirrocumulus. Many cirrus clouds produce hair-like filaments made of...

Word of the Day
tessitura
  • The prevailing range of a vocal or instrumental part, within which most of the tones lie.
This word is Italian in origin and comes from the Latin 'textura,' web, structure.