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squall
Sinônimos - Inglês
squally weather
Definição1
A strong wind characterized by a sudden onset in which the wind speed increases at least 16 knots and is sustained at 22 knots or more for at least one minute. 2. In nautical use, a severe local storm considered as a whole, that is, winds and cloud mass and (if any) precipitation, thunder and lightning.
Fonte1
AMERICAN METEOROLOGICAL SOCIETY. Glossary of meteorology. [S.l., última modificação 05 oct. 2015]. Disponível em: < http://glossary.ametsoc.org/wiki/Main_Page >. Acesso em: 20 jun. 2022.
Definição2
Atmospheric phenomenon characterized by an abrupt and large increase of wind speed with a duration of the order of minutes which diminishes rather suddenly. It is often accompanied by showers or thunderstorms.
Fonte2
WORLD METEOROLOGICAL ORGANIZATION. International meteorological vocabulary. 2nd ed. Geneva, 1992. (WMO, n.182). Disponível em: < https://library.wmo.int/index.php?lvl=notice_display&id=220#.XeauGOhKiUk >. Acesso em: 11 dez. 2019.
Fonte3
WORLD METEOROLOGICAL ORGANIZATION. Guide to meteorological instruments and methods of observation. 7th ed. Geneva, 2006. (WMO, n.8).
Fonte4
INTERNATIONAL CIVIL AVIATION ORGANIZATION. Circular 69: aircraft accident digest n.13. Montreal, 1963. (Cir. 69-AN/61)
Nota Adicional1
Acronym in English: SQ.
Nota Adicional2
In U.S. observational practice, a squall is reported only if a wind speed of 16 knots or higher is sustained for at least two minutes (thereby distinguishing it from a gust).
Nota Adicional3
In nautical use, a severe local storm considered as a whole, that is, winds and cloud mass and (if any) precipitation, thunder and lightning.
Nota Adicional4
Squalls are frequently associated with the passage of cold fronts. In such circumstances, they occur in a line and are accompanied, typically, by a sharp fall of temperature, veer of wind, a rise in relative humidity, and a roll-shaped cloud with horizontal axis (line squall).
Contexto
Furthermore, the engineer aboard the aircraft stated that the airspeed indicator suddenly fell from 118 to 85 when the aircraft entered the squall.
Subárea
Aeronautical Meteorology
Français
grain