|
|
Hoarfrost
Hoarfrost
| With
abundant fog around this winter, the Inland Northwest has seen its share
of hoarfrost development. These photos, depicting quite large growth of
the frost was taken outside our office during the third week of January. |
 |
|
By
definition, hoarfrost, or white frost, is a deposit of interlocking
ice crystals formed by direct sublimation on objects, usually those
of small diameter freely exposed to the air, such as tree branches.
The
deposition of hoar frost is similar to the process in which dew is formed,
except that the temperature of the befrosted object must be below freezing.
It forms when air with a dew point below freezing is brought to saturation
by cooling.
|
 |
|
|
|
Webmaster
US Dept of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
Spokane Weather Forecast Office
2601 N. Rambo Rd.
Spokane, Washington 99224
Tel: (509) 244-0110
|
Disclaimer
Information Quality
Credits
Glossary |
Privacy Policy
Freedom of Information Act
About Us
Career Opportunities
|
National Weather Service Mission: "The
National Weather Service (NWS) provides weather,
hydrologic, and climate forecasts and warnings for
the United States, its territories, adjacent waters
and ocean areas, for the protection of life and
property and the enhancement of the national economy.
NWS data and products form a national information
database and infrastructure which can be used by
other governmental agencies, the private sector,
the public, and the global community." |
|
|
www.weather.gov 
