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funnel cloud
- Definição1
- A rotating, cone-shaped column of air extending downward from the base of a thunderstorm but not touching the ground. When it reaches the ground it is called a tornado.
- Fonte1
- SPELLMAN, Frank R. The Handbook of Meteorology. Lanham, Maryland: Scarecrow Press, Inc., 2013. 237 p. ISBN 978-0-8108-8613-1.
- Definição2
- A phenomenon consisting of an often violent whirlwind, revealed by the presence of a cloud column or inverted cloud cone (funnel cloud), protruding from the base of a Cumulonimbus. The cloud may extend all the way down to the Earth’s surface, but not necessarily reaching the ground in which case water, dust, sand, or litter may be raised, producing a “bush” around the tip of the funnel. The diameter can vary from a few metres to some hundreds of metres. A funnel cloud is considered well-developed if the violent rotating column of air touches the ground or water surface. A well-developed funnel cloud is considered a tornado if over ground and a waterspout if over water. The most violent tornadoes can have associated wind speeds of up to 150 m s-1.
- Fonte2
- WORLD METEOROLOGICAL ORGANIZATION. Guide to meteorological instruments and methods of observation. Geneva, 2012. (WMO, n.8).
- Fonte3
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. ICAO abbreviations and codes: procedures for air navigation services. 7th. ed. Montreal, 2007. (Doc. 8400).
- Nota adicional1
- Acronym in English: FC.
- Contexto
- Vicinity of the aerodrome (followed by FG = fog, FC = funnel cloud, SH = shower, PO = dust/sand whirls, BLDU = blowing dust, BLSA = blowing sand, BLSN = blowing snow, DS = duststorm, SS = sandstorm, TS = thunderstorm or VA = volcanic ash, e.g. VCFG = vicinity fog)
- Subárea1
- Meteorology
- Português
- nuvem-funil
- Imagem
The funnel cloud that developed into the 2007 Elie, Manitoba tornado.
Fonte: http://en.wikipedia.org/wiki/File:F5_tornado_funnel_cloud_Elie_Manitoba_2007.jpg
