Wind Flashcards
Whats the time period over which winds are averaged on the Weather Report to ATC and METAR?
10 Minutes
In the UK wind directions are reported by the Met Office in units of…… with wind speeds in…….
Degrees True and Knots
The force that first acts on air to put it into motion is the
The pressure gradient Force
The deflecting force, that then acts on the air in motion, always deflecting to the…. and in the Northern Hem is called…..
East, Coriolis Force.
The wind produced when these forces are equal in magnitude and opposite in direction is known as a
Geostrophic Wind
Surface wind directions are….. with the speeds being…… from the geostrophic winds above. The force responsible for this is…..
backed, reduced, Friction
Which direction does veering travel?
Clockwise
Which direction does Backing Travel?
Anti- clockwise
T or F, Changes in wind direction at the surface can always be described as ‘backing’.
False
An increase in wind speed lasting a few seconds is a ……
Gust
An increase in wind speed lasting several minutes, often associated with a change in direction and with heavy showers or thunderstorms is a…..
Squall
A mean or average speed 34 KT or more; OR gusts 43 KT or more is a….
Gale
Which local wind effect is sometimes responsible for severe turbulence on the downwind side of large orographic features?
Mountain Waves
Which local wind effect might lead to fog rolling onshore during the summer? Answer
A sea breeze
Which local wind effect is caused by a combination of nocturnal cooling and topographical variations?
Karabatic Winds
