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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?
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?
- Precipitation static
- Wind-shear turbulence (correct)
- Steady rain
A nonfrontal, narrow band of active thunderstorms that often develops ahead of a cold front is known as a:
A nonfrontal, narrow band of active thunderstorms that often develops ahead of a cold front is known as a:
- Prefrontal system
- Dry line
- Squall line (correct)
What conditions are necessary for the formation of thunderstorms?
What conditions are necessary for the formation of thunderstorms?
- High humidity, high temperature, and cumulus clouds
- Lifting force, moist air, and extensive cloud cover
- High humidity, lifting force, and unstable conditions (correct)
During the life cycle of a thunderstorm, which stage is characterized predominately by downdrafts?
During the life cycle of a thunderstorm, which stage is characterized predominately by downdrafts?
Thunderstorms reach their greatest intensity during the:
Thunderstorms reach their greatest intensity during the:
What feature is normally associated with the cumulus stage of a thunderstorm?
What feature is normally associated with the cumulus stage of a thunderstorm?
Which weather phenomenon signals the beginning of the mature stage of a thunderstorm?
Which weather phenomenon signals the beginning of the mature stage of a thunderstorm?
Thunderstorms which generally produce the most intense hazard to aircraft are:
Thunderstorms which generally produce the most intense hazard to aircraft are:
Which weather phenomenon is always associated with a thunderstorm?
Which weather phenomenon is always associated with a thunderstorm?
The mature stage of a thunderstorm begins with:
The mature stage of a thunderstorm begins with:
The destination airport has one runway, 8-26, and the wind is calm. The pilot decides to:
The destination airport has one runway, 8-26, and the wind is calm. The pilot decides to:
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?
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?
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Study Notes
Thunderstorm Fundamentals
- Thunderstorm activity near an airport can lead to wind-shear turbulence during landing approaches.
- A nonfrontal, narrow band of thunderstorms developing ahead of cold fronts is called a squall line.
Conditions for Thunderstorms
- Necessary conditions for thunderstorm formation include high humidity, lifting forces, and unstable atmospheric conditions.
- The cumulus stage of a thunderstorm is characterized by continuous updrafts.
Thunderstorm Life Cycle
- The dissipating stage of a thunderstorm is primarily dominated by downdrafts, marking the end of storm energy.
- Thunderstorms achieve maximum intensity during the mature stage, indicated by the start of precipitation.
Thunderstorm Hazards
- Squall line thunderstorms pose the most significant hazards to aircraft compared to other types.
- Lightning is an essential weather phenomenon that accompanies every thunderstorm, while heavy rain and hail are not guaranteed.
Approach and Safety Considerations
- The mature stage initiation of a thunderstorm is marked by precipitation starting to fall.
- When faced with an approaching thunderstorm, pilots may choose to delay departure until the storm dissipates for safety.
Hazards Under Thunderstorm Anvils
- Even from a safe distance of over 20 miles from a thunderstorm cell, being under the anvil can still pose a danger due to potential hail discharge.
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