Altimetry And Oressure Systems Flashcards
When adjusting altimeter setting the TA will
Remain the same
Air surface flow in n. Hemi - low pressures
Anti Clockwise
Air surface flow is s.hemi - low pressures
Clockwise
Coke front gradient
1:80
Cold front contains
TS CB and CU formations
Heavy rain
Hail (GS and GRh
At the start of the cold front
Visibility is poor!
Trough lines contain
Active Cu formed clouds
High pressure systems between Hadley and Ferrell cells
Sub tropical highs
Sub tropical highs found at
20· lat
55 · lat
Sub tropical highs give
Stable weather
A polar low is found
On thé polar frontal surface
A polar low is
A small depression over sea areas accompanied by wintry showers
A secondary depression
Tends to move round the primary in a cyclonic sense
Carb icing most likely to happen at
0-15 degrees
The most likely condition to cause airframe icing is
+FZRA
Hoar frost
Humid air mass
Validity of a TAF
Is stated in the TAF
Validity of the METAR is
Valid at the time of observation
BR = and HZ=
Must and haze
Thé widest precipitation zone occurs usually
Ahead of a warm front
Sinking of air is
Favoured in a high pressure system
For Tornados to occur
You need a circular motion of air which can be described in metar with a wind heading and a VRB notation
Anti cyclone in n hémisphère
Is deflected to the right
Anti cyclone is s hémisphère
Is deflected to the left
High isobars always ____ and low isobars always _____
Curve up and curve down
The layer just above the tropopause
Is absolutely stable
The pressure defined as QFE
Is the pressure at field elevation
