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Related Flashcards
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Cards In This Set
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What are the requirements for a thunderstorm?
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1. Moisture2. Unstable air3. Lifting action
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What wether hazards can accompany thunderstorms?
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- Extreme turbulence- Hail- Microbursts- Severe Icing- Lightning- Tornadoes
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How far from the thunderstorm can gust fronts travel?
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5 to 20 miles
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How far above cloud tops can thunderstorm turbulence travel
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5,000 feet
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What are the three pressure variations associated with thunderstorms?
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1. A rapid fall in pressure as the storm approaches2. An abrupt rise in pressure with the onset of the first gust and arrival of rain showers3. A gradual return to normal pressure as the storm passes and the rain ceases
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In what conditions do most aircraft lightning strikes occur?
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1. Within 8 degrees C of the freezing level2. Within approximately 5,000 ft of the freezing level3. In precipitation, including snow4. In clouds5. In some turbulence
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What is the name of a tornado that does not touch down? What about if it touches down over water?
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A funnel cloud. A waterspout
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In what situations do tornados occur?
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Only in severe thunderstorms
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What type of clouds do microbursts come from?
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Any convective cloud
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What name is given for rain that doesn't reach the ground?
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Virga
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Annnnnd, microburst
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AVOID, AVOID, AVOID
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With what weather observations does the potential for microburst activity exist?
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Low-level wind shear, gusty winds, heavy rain, or severe thunderstorms
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What are the visual cues of microbursts?
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- Virga- Localized blowing dust- Rain shafts with rain diverging away from the core of the cell- roll clouds- Lightning or tornado-like activity
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In what part of the thunderstorm cell does most icing occur? What kind of icing is it?
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The top 2/3. Clear icing
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Why is a thunderstorm with radar echo tops above 35,000 ft of interest to pilots?
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It often contains extreme turbulence and hail
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