Hoar Frost
Under clear frosty nights in winter soft ice crystals might form on vegetation or any object that has been chilled below freezing point by radiation cooling.
Hoar Frost: Formation of interlocking ice crystals directly from the water vapour in the atmosphere on objects which usually are of small size and exposed freely to the air such as plant leaves and branches.
Hoar Frost
A deposit of interlocking crystals formed by direct sublimation on objects, usually those of small diameter freely exposed to the air, such as tree branches, plants, wires, poles, etc.
hoar frost—See frost.
humidity—Water vapor content of the air; may be expressed as specific humidity, relative humidity, or mixing ratio.
Hoar Frost
Ice crystals deposited on objects below 0 degrees Celsius or dew that freezes after formation.
Humidity ...
Hoar Frost: Crystalline ice which forms on surfaces that are below freezing. Appear like feathers, needles, leaves, ferns.
Hook Echo: A pattern on a radar scope which resembles a hook often associated with a tornado.
Deposition is the process by which, in sub-freezing air, water vapor changes directly to ice without first becoming a liquid. This is how snow forms in clouds, as well as frost and hoar frost on the ground. The reverse of deposition is sublimation.
of its meteorological properties and large enough to remain relatively self-contained and respond to all meteorological processes.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Condensation, Hoar Frost, ...
 See also: Frost, Freezing, Clouds, Cloud, Water
  
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