7.4: Thunderstorms Flashcards
If there is thunderstorm activity in the vicinity of an airport at which you plan to land, which hazardous atmospheric phenomenon might be expected on the landing approach?
A. Precipitation static.
B. Wind-shear turbulence.
C. Steady rain.
Wind-shear turbulence.
A nonfrontal, narrow band of active thunderstorms that often develop ahead of a cold front is known as a
A. prefrontal system.
B. squall line.
C. dry line.
squall line.
What conditions are necessary for the formation of thunderstorms?
A. High humidity, lifting force, and unstable conditions.
B. High humidity, high temperature, and cumulus clouds.
C. Lifting force, moist air, and extensive cloud cover.
High humidity, lifting force, and unstable conditions.
During the life cycle of a thunderstorm, which stage is characterized predominately by downdrafts?
A. Cumulus.
B. Dissipating.
C. Mature.
Dissipating.
Thunderstorms reach their greatest intensity during the
A. mature stage.
B. downdraft stage.
C. cumulus stage.
mature stage.
What feature is normally associated with the cumulus stage of a thunderstorm?
A. Roll cloud.
B. Continuous updraft.
C. Frequent lightning.
Continuous updraft.
Which weather phenomenon signals the beginning of the mature stage of a thunderstorm?
A. The appearance of an anvil top.
B. Precipitation beginning to fall.
C. Maximum growth rate of the clouds.
Precipitation beginning to fall.
Thunderstorms which generally produce the most intense hazard to aircraft are
A. squall line thunderstorms.
B. steady-state thunderstorms.
C. warm front thunderstorms.
squall line thunderstorms.
Which weather phenomenon is always associated with a thunderstorm?
A. Lightning.
B. Heavy rain.
C. Hail.
Lightning.
The mature stage of a thunderstorm begins with
A. formation of the anvil top.
B. the start of precipitation.
C. continuous downdrafts.
the start of precipitation.
The destination airport has one runway, 8-26, and the wind is calm. The normal approach in calm wind is a left-hand pattern to runway 8. There is no other traffic at the airport. A thunderstorm about 6 miles west is beginning its mature stage, and rain is starting to reach the ground. The pilot decides to
A. depart expecting the thunderstorm to dissipate prior to arrival, then land on runway 8.
B. delay departure until the thunderstorm has dissipated.
C. fly an approach to runway 26 since any unexpected wind due to the storm will be westerly.
delay departure until the thunderstorm has dissipated.
You are avoiding a thunderstorm that is in your flightpath. You are over 20 miles from the cell; however, you are under the anvil of the cell. Is this a hazard?
A. No, you are at a safe distance from the cell.
B. Yes, hail can be discharged from the anvil.
C. Yes, this is still in the area of dissipation.
Yes, hail can be discharged from the anvil.
