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Weather Formation

QuestionAnswer
What are the characteristics of stable air? Poor visibility and steady precipitation.
A weather report indicates you can expect a low-level temperature inversion with high relative humidity. What weather conditions would you expect? Smooth air, poor visibility, fog, haze, or low clouds.
The average lapse rate in the troposphere is 2.0°C per 1,000 feet.
What is meant by the term "dewpoint"? The temperature to which air must be cooled to become saturated.
The passage of which type of front poses the highest risk to small UA operations? Cold front
In what part of the atmosphere does most weather occur? Troposphere.
The suffix "nimbus," used in naming clouds, means a rain cloud.
Steady precipitation preceding a front is an indication of stratiform clouds with little or no turbulence.
When there is a temperature inversion, you would expect to experience An increase in temperature as altitude is increased.
What would decrease the stability of an air mass? Warming from below.
What is the primary cause of all changes in the Earth's weather? variation of solar energy received by the Earth's regions.
One weather phenomenon which will always occur when flying across a front is a change in the wind direction.
What causes variations in altimeter settings between weather reporting points? Unequal heating of the Earth's surface
What are the characteristics of an unstable atmosphere? What are the characteristics of an unstable atmosphere?
At approximately what altitude above the surface would you expect the base of cumuliform clouds if the surface air temperature is 77°F and the dewpoint is 53°F? 5,500 feet AGL.
Which weather conditions should be expected beneath a low-level temperature inversion layer when the relative humidity is high? Smooth air, poor visibility, fog, haze, or low clouds.
What measurement can be used to determine the stability of the atmosphere? Actual lapse rate.
Clouds, fog, or dew will always form when water vapor condenses.
The ratio of the existing water vapor in the air, as compared to the maximum amount that could exist at a given temperature, is called relative humidity.
What are characteristics of a moist, unstable air mass? Turbulence and showery precipitation.
Every physical process of weather is accompanied by, or is the result of heat exchange.
A characteristic you would expect to see with a stable air mass is poor surface visibility.
Which will produce the least favorable conditions for the operation of a small UA? Warm, moist air.
At approximately what altitude above the surface would you expect the base of cumuliform clouds if the surface air temperature is 33°C and the dewpoint is 15°C? 7,200 feet AGL.
One of the most easily recognized discontinuities across a front is a change in temperature.
Some of the characteristics you would expect to see with an unstable air mass are turbulence and good surface visibility
If the temperature/dewpoint spread is small and decreasing, and the temperature is 62° F, what type weather is most likely to develop? Fog or low clouds.
Which clouds have the greatest turbulence? Cumulonimbus
The boundary between two different air masses is referred to as a front
Created by: Azxaviern
 

 



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