Lesson 204 Decoding Met Info Flashcards
There are how many GFA domains for Canadian domestic airspace?
Seven
GFAs are issued _______ times per day and depict the most probable meteorological conditions expected to occur at or below __________ ft.
Four
24,000 Ft
MVFR implies a ceiling of _______ to _______ feet and visibility of _____ to _____ miles.
1000 to 3000 ft AGL
3 to 5 miles
On GFAs in regard to convective clouds and showers; decode the abbreviations and give their respective percentages.
ISOLD
OCNL
FRQ
ISOLD - Isolated 25% or less
OCNL - Occasional 26-50%
FRQ - Frequent, greater than 50%
In regards to non-convective clouds and precipitation, decode the following abbreviations and provide their respective spatial coverage.
LCL
PTCHY
XTNSV
LCL - Local, 25% or less
PTCHY - Patchy, 26-50%
XTNSV - Extensive, greater than 50%
On a GFA, are multiple layers based on summation amount?
No, each layer is based on the amount of cloud at that level.
A SIGMET will be issued for:
TTIMLDSR
Thunderstorm, turbulence, icing, mountain waves, low level wind shear, dust storm, sand storm, radioactive cloud.
What conditions warrant an Urgent PIREP?
VTSSHLO
Volcanic ash Tornado, funnel cloud, waterspout Severe turbulence Severe icing Hail Low level wind shear 1500' and below Other hazardous or potentially hazardous phenomena.
True or false, in a FD, 9900 indicates calm wind for a given level.
True
What are the six limitations of aviation forecasts?
HENSEF
Human interpretation Extrapolation Numerical weather prediction Scientific knowledge Experience Forecast products
On an 850 and 700 hPa upper air analysis, the smaller the quadrilateral, the _________ the cold or warm air advection. Advection is _________ as the angle made by the two isopleths is decreased.
Stronger
Decreased
