Formation of Upslope Fog Quiz
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Questions and Answers

What condition is necessary for Drizzle and Snow Grains to form, as mentioned in the text?

  • Drizzle and Snow Grains form from air masses with very high moisture content.
  • Rain and Snow form from air masses with very low moisture content.
  • Drizzle and Snow Grains form from low-lying clouds with very little vertical development.
  • Drizzle and Snow grains require an overlying cold layer of air aloft to produce the precipitation, with a warmer above-freezing layer beneath. (correct)

    • What advantage does ground-based Weather Radar have over airborne radar, according to the text?

  • Less Backscatter, and ability to receive reflected energy back from the storm.
  • Higher Reflectivity, and the ability to see smaller forms of precipitation.
  • Less Attenuation, and the ability to see further into the storm. (correct)
  • Higher beam width, and ability to see more of the storm per sweep.

    • Why are ground weather radar products considered to paint a more accurate picture of precipitation than airborne weather radar?

  • Ground weather radar is closer to the precipitation it is painting.
  • Ground weather radar is more current in terms time.
  • Ground weather radar is operated by individual people, rather than being automated.
  • Ground weather radar products are less prone to attenuation, and is stitched together from multiple radar sites. (correct)

    • What types of precipitation are most reflective to Weather Radar?

    <p>Liquid, Numerous, and Large.</p> Signup and view all the answers

    In what way do Drizzle and Snow Grains differ from Rain and Snow in their formation?

    <p>Drizzle and Snow grains require an overlying cold layer of air aloft to produce the precipitation, with a warmer above-freezing layer beneath.</p> Signup and view all the answers

    What is the main difference between flight within an ACSL cloud and flight beneath the lowest ASCL cloud?

    <p>About the same level of turbulence within as below</p> Signup and view all the answers

    Why is a 'Bora' wind also called a 'Fall' wind?

    <p>Because the cold air descends the leward slope quickly and 'falls' off the mountains due to its relatively high density</p> Signup and view all the answers

    How do Dust Devils form?

    <p>Wind swirls behind a large obstruction</p> Signup and view all the answers

    What do KH Wave clouds indicate concerning the atmosphere above and below the base of the clouds?

    <p>High winds aloft, with relatively calm winds below</p> Signup and view all the answers

    What is a key operational difference for a Pilot flying an Aircraft between an Indefinite Ceiling with a vertical Visibility of 500' and an overcast layer at 500' with no reported obstructions to visibility below the overcast?

    <p>An Overcast Layer has much worse slant-range visibility.</p> Signup and view all the answers

    When will Obstructions to Visibility be reported on an Aviation Routine Weather Report (METAR) or Terminal Aerodrome Forecast (TAF)?

    <p>When the obstruction reduces visibility to below 7 statute miles.</p> Signup and view all the answers

    How does Radiation Fog form?

    <p>The Earth cooling after sunset causes the Air Temperature to drop to the Dewpoint.</p> Signup and view all the answers

    Where is turbulence usually associated with airmass fronts located?

    <p>Near Cumulus clouds at lower altitudes.</p> Signup and view all the answers

    How does Steam Fog form?

    <p>As a result of warm, moist air moving over colder water bodies.</p> Signup and view all the answers

    What does Weather Radar best display for pilots?

    <p>The total water content in a cloud (sum of solid, liquid, and gaseous water)</p> Signup and view all the answers

    How should a pilot of a light, single-engine airplane use ground-based Weather Radar when enroute?

    <p>To make go/no-go or proceed/divert decisions</p> Signup and view all the answers

    What determines whether a Parcel of Air will continue to rise after it has been subject to some type of initial Lifting Action?

    <p>The Air Parcel's Density relative to the Surrounding Air</p> Signup and view all the answers

    In order for the Atmosphere to exhibit 'Absolute' stability, how must it cool as altitude increases?

    <p>At a slower rate than</p> Signup and view all the answers

    In order for the Atmosphere to exhibit 'Neutral' stability, how must it cool as altitude increases?

    <p>At the same rate as</p> Signup and view all the answers

    What causes the Air Temperature to drop to the Dewpoint in the text provided?

    <p>The movement of warm, moist air from over Water to colder Land</p> Signup and view all the answers

    In what scenario would Fog be reported instead of Drizzle based on the text?

    <p>If the obstruction to visibility is due to suspended water particles rather than precipitating water particles</p> Signup and view all the answers

    How is Blowing Snow differentiated from regular Snow on a METAR report as per the text?

    <p>Blowing Snow involves snow that has already fallen to the Earth's surface, rather than snow falling from a cloud as Precipitation</p> Signup and view all the answers

    Why would an Aviation Routine Weather Report (METAR) report Fog instead of Mist according to the text?

    <p>If visibility drops below 7 statute miles</p> Signup and view all the answers

    Under what conditions would a METAR or TAF report Fog instead of Mist as stated in the text?

    <p>If visibility drops below 7 statute miles</p> Signup and view all the answers

    How does Upslope Fog form?

    <p>Air is pushed uphill by wind, and the Air Temperature drops to the Dewpoint from Adiabatic Cooling</p> Signup and view all the answers

    Why is Volcanic Ash particularly dangerous to Aircraft Operations, as compared to other types of obstructions to Visibility?

    <p>Volcanic Ash is extremely abrasive, and can cause Windscreens of Aircraft to become opaque</p> Signup and view all the answers

    What leads to the formation of Precipitation?

    <p>Any form of water particle that falls from the atmosphere to reach the ground</p> Signup and view all the answers

    In what scenario does Air Temperature drop to the Dewpoint due to Adiabatic Cooling?

    <p>Air is pushed uphill by wind</p> Signup and view all the answers

    Which process raises the Dewpoint up to the Air Temperature?

    <p>Relatively warmer Water releasing water vapor into the Atmosphere</p> Signup and view all the answers

    What is a key characteristic of Cumulus clouds that pilots should consider to avoid turbulent parts of the atmosphere?

    <p>Vertical development</p> Signup and view all the answers

    How does airspeed impact an aircraft's reaction to turbulence near Cumulus clouds?

    <p>Increases the effect of turbulence</p> Signup and view all the answers

    Where is turbulence typically located in relation to airmass fronts?

    <p>Right before the front</p> Signup and view all the answers

    What type of weather phenomenon can radar help detect in aviation?

    <p>Turbulence</p> Signup and view all the answers

    What does ASCL stand for in aviation meteorology?

    <p>Answer: Airspace Constraint Limitation</p> Signup and view all the answers

    In which region would you most likely encounter Arctic fog?

    <p>Arctic region</p> Signup and view all the answers

    'Radiation fog' is primarily caused by what atmospheric phenomenon?

    <p>Advection of warm air over cool surfaces</p> Signup and view all the answers

    What type of weather phenomenon can radar help detect in aviation?

    <p>Turbulence</p> Signup and view all the answers

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