Weather Flashcards
Cumulus clouds indicate…
unstable air and good visibility.
Stratus clouds indicate…
stable air with poor visibility.
When speaking to a Flight Service weather briefer, you should state:
whether the flight is VFR or IFR. (The pilot should give clear and concise facts about their flight, which includes type of flight (VFR or IFR).)
There is no requirement to tell the briefer a summary of your qualifications or the PIC’s full name and address.
Cloud type that indicates convective turbulence.
Towering cumulus clouds.
These clouds signify a relatively deep layer of unstable air and can be accompanied by showers, very strong turbulence, and some clear icing.
Clouds that tend to have very little turbulence but can pose a serious icing problem if temperatures are near or below freezing
Nimbostratus clouds
High altitude clouds not associated with convection
Cirrus clouds
Radar weather reports are of special interest to pilots because they indicate:
location of precipitation along with type, intensity, and cell movement of precipitation.
If you are on approach and picking up 1/2 in. of rime ice on the leading edge of your wings, you should consider:
A faster than normal approach and landing speed.
Ice accumulates unevenly on the airplane. It adds weight and drag (primarily drag) and decreases thrust and lift. With ice accumulations, Ice adds weight and drag and decreases thrust and lift. The landing approach should be made with more speed. A minimum wing flap setting and with an added margin of airspeed.
AIRMET definition, valid time, types
Weather with a potential to be hazardous to some smaller aircraft. 6 hours.
Sierra - mountain obscuration and visibility
Zulu - icing
Tango - turbulence
SIGMET definition, valid time
Weather with a potential to be hazardous to all aircraft, and extreme weather not associated with thunderstorms. 4 hrs.
Convective SIGMET definition, valid time
Thunderstorms. Surface winds greater than 50 kts, hail 3/4 in. 2 hrs, but can extend for 6 hrs.
