Meteorology (Frontal Systems, Icing, Fog, Thunderstorms and Wind Shear) Flashcards
You are on shift and, during a weather check for a pending flight request, you notice that the latest METAR shows that the wind has shifted from 230 to 350, the temperature and dew point have dropped, and the pressure has begun to rise.
What has happened?
A cold front has passed the area.
AC 006A, p. 65
What type of weather can you expect from moist, unstable air and very warm surface temperatures?
Strong updrafts and cumulonimbus clouds
AC 00-6A Chapter 8
You receive a call for a flight 1 hour before sunrise.
It is mid-April and your weather check shows clear skies and light to no wind conditions. The visibility has reduced over the past two hours and the temp/dew point spread is nearing the 4 degree mark.
What kind of conditions can you expect if you accept the flight?
Radiation fog may begin to form,
especially if the winds are light.
AC 006A, p 126
What are some symptoms of hypoxia?
Feeling of exhaustion, euphoria, impairment of judgment and vision, unconsciousness.
AC 006A Chapter 1
If the pitot tube becomes blocked, which instrument becomes unreliable?
The airspeed indicator.
It uses ram air from the pitot tube, compared with static air from the static vent(s) to display airspeed. A blocked pitot tube will only affect the airspeed indicator.
How long is an Area Forecast valid?
VFR/MVFR for 12 hours with a 12-18 hour categorical outlook forecast for VFR, MVFR & IFR
AC00-45F (7.1.1)
What are the stages and life cycle of a thunderstorm?
- Cumulus stage, up drafts;
- Mature stage, rain begins to fall, up and down drafts;
- Dissipating stage, down drafts.
- When the rain has ended and the down drafts have abated the TRW has ended
AC 006A Page 111
What causes wind?
Pressure differences
AC 00-6A Chapter 4
