Weather 5 Flashcards
The National Convective Weather Forecast provides forecasts for
hazardous convective weather in the U.S. only.
As you approach an airport to land, you observe convective clouds over the airport with virga below. This could indicate
the presence of a microburst
What are some weather indications of the imminent passage of a cold front?
High dew point, falling barometric: pressure.
If ice pellets are falling while you are performing your preflight inspection, what does
this indicate?
An inversion is taking place .
Where is the strongest turbulence in the jet stream found
On the polar side of the jet stream due to decreasing winds
What is tropopause?
boundary between troposphere and stratosphere
You are flying on a warm, sunny day, and a scattered cumulus cloud layer is above you.
You should
climb above the cumulus layer for smoother air.
What type of weather conditions can be expected before the passage of an occluded front?
Precipitation and poor visibility .
Where are you most likely to encounter clear air turbulence (CAT)?
Between 20,000 feel and 50,000 feet in a cloud-free area.
When flying over a mountain range with turbulence, mountain waves cause downdrafts on the
crest and downwind of the mountain range for hundreds of miles.
Large changes In attitude and altitude, changes in airspeed, and momentary loss of control is
reported as
Sever Turbulence
The jet stream is strongest
In the Northern and southern hemispheres winters.
Which kind of wind shear is most hazardous?
Convective wind shear.
1112/1212
1200Z on the 111h day of the month ta 1200Z on the 12th day of the month.
Cumuliform clouds: NONE
Plane: Change in altitude and positive control
Reaction inside: Feel definite strain against seatbelt
Moderate CAT
A supercell thunderstorm is near your destination airport. You should be aware that
these storms
may remain for several hours.
The standard temperature lapse rate below the tropopause
remains the same.
You are flying and notice virga above your airport of intended landing and dust billowing up
from the ground.
You should flyaway from the airport as this is an indication of a microburst
The weather forecast for the next morning at a coastal airport includes temperature 16 C, dew
point 16 C, and winds 180 at 10 knots. What weather is expected?
Foggy, with god intensifying until wind increasing above 15 knots
What weather phenomenon often spawns tornadoes?
A squall line
Jet streams are bands of strong wind
in the upper levels of the atmosphere.
Which is a danger of a gust front associated with a thunderstorm?
Low level wind shear.
OCNL SE\/ CAT BTN FL280 AND FL350
Occasional several clear air turbulence between FL 280 and FL 350
When precipitation falls through air that is more than 0 C into air that is less than 0 C, what
weather conditions can you expect?
Freezing precipitation
