Weather & Aviation Weather Sources Flashcards
What is the sudden, drastic change in wind that can happen at any altitude?
Wind Shear
What is the effect on engine performance in high density altitudes?
Decreased efficiency
What is the effect on engine performance during low density altitudes?
Increased efficiency
What are the three life cycles of a thunderstorm?
Cumulus, Mature, Dissipating
Which thunderstorm life cycle is characterized by downdrafts?
Dissipating
High wispy clouds
Stratus
What can be caused by an aircraft flying through visible water such as rain or cloud droplets and the temperature where the moisture strikes the aircraft is 0 degrees Celsius?
Structural Icing
What is the zone between two different air masses where temperature, humidity, and wind can change over short distances?
Front
What is a sudden, drastic change in wind speed and/or direction over a very small area?
Wind Shear
What is the routine observation of current surface weather reported in a standard international format?
METAR
Name two weather sources that play a major role in gathering surface observations.
ASOS & AWOS
What is the altitude in the standard atmosphere that corresponds to a particular value of air density?
Density Altitude
What effect does air density have on density altitudes?
Decrease in air density = high density altitude
Increase in air density = low density altitude
Thin air refers to what density altitude?
High Density Altitude
Dense air refers to what density altitude?
Low Density Altitude
What density altitude is caused by high elevations, low atmospheric pressures, high temperatures, high humidity, or some combination of these factors?
High Density Altitudes
What density altitude is caused by lower elevations, high atmospheric pressure, low temperatures, low humidity, or a combination of these factors?
Low Density Altitude
What proportionally relates to density so that when it is doubled or lowered, so is the density?
Pressure