Weather Flashcards
(25 cards)
Advection fog
Sea fog; is formed when warm, moist air moves over cold ground or water
What feature is normally associated with the cumulus stage of a thunderstorm?
Continuous updraft
What does RAB35 mean?
Rain began 35 mins past the hour
What is the best way for a remote pilot to determine the likelihood of local fog formation?
Monitor the temperature/dew point spread
Thunderstorms which general produce the most intense hazard to aircraft are
Squall line thunderstorms
What effect does high density altitude have on the efficiency of a small unmanned air craft propeller?
Propeller efficiency is decreased
One of the most easily recognized discontinuities across a from is
A change in temperature
How would high density altitude affect the performance of a small unmanned aircraft?
Decreased performance
What causes variations in altimeter settings between weather reporting points?
Unequal heating of the Earth’s surface
What are the current conditions for Chicago midway airport (KMDW)?
Sky 700 feet overcast, visibility 1-1/2 SM, rain.
OVC007- sky 700ft overcast
ASOS
Automated Surface Observing System
AWOS
Automated Weather Observing System
What weather provides the best flying conditions?
Cool, dry air
The zone between different temperature, humidity, and wind is called
A front
Which weather phenomenon signals the beginning of the mature stage of a thunderstorm?
Precipitation beginning to fall
What are the standard temperature and pressure values for sea level?
15°C and 29.92 Hg
One in flight condition necessary for structural icing to form is
Visible moisture
Over which area should a remote pilot expect to find the highest amount of thermal currents under normal conditions?
Dry areas
Low level temp inversion with high relative humidity
- Smooth air, poor visibility, fog, haze, or low clouds
- Light wind shear, poor visibility, haze, and light rain
- Turbulent air, poor visibility, fog, low stratus type cloud, and showery precipitation
Smooth air, poor visibility, haze, and light rain
What types of fog depend upon wind in order to exist?
- Radiation and ice
- Steam and ground
- Advection and upslope
Advection and upslope
In which en I is aircraft structural ice most likely to have the highest accumulation rate?
1. Cumulus clouds with below freezing temps
2. Freezing drizzle
3. Freezing rain
Freezing rain
The presence of ice pellets at the surface is evidence that there
1. Are thunderstorms in the area
2. Has been a cold frontal passage
3. Is a temperature inversion with freezing rain at a higher altitude
Is a temperature inversion with freezing rain at a higher altitude
Every physical process of weather is accompanied by or is the result of a
1. Movement of air
2. Pressure differential
3. Heat exchange
Heat exchange
One in flight condition necessary for structural icing to form is:
1. Small temp/dew point spread
2. Stratiform clouds
3. Visible moisture
Visible moisture
