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Aviation Ceilings and Visibilities

When talking about aviation, what are some of the things that will alter our flight rules? How can we anticipate the occurrence of these events? You will have 5 minutes to answer questions related to ceilings and visibilities, including the discussion of phenomena like fog.
Quiz by SkypeGPre
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Last updated: December 11, 2022
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First submittedDecember 11, 2022
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Average score51.9%
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Hint
Answer
Layer we will first consider ceilings
BKN/OVC
Low-level cloud types
Fog/Stratus
Mid-level cloud types
Altostratus/Altocumulus
Upper-level clouds types
Cirrus/Cirrostratus/Cirrocumulus
Vertically developed clouds
Cumulus/Cumulonimbus
Clouds that come from the exhaust of a plane
Contrails/Distrails
Different types of fog (name any of them! There are 4 types)
Radiation/Advection/upslope/steam
Radiation fog will occur when temperature is reduced to dewpoint from ______ ________
Radiational cooling
Conditions that are favorable for radiation fog formation
Recent precipitation/proximity to body of water/saturated layer above ground/clear skies/light winds/minimal mixing/inversion aloft
The dissipation of radiational fog occurs as the result of _______ _______
Diurnal heating
T or F: Advection fog happens as cold air advects over a warm surface
F
Advection fog will occur in ______ ______
Stable layers
Upslope fog will occur when moist air is forced up terrain and ________ _______
Cools adiabatically
T or F: Steam fog happens when warm waters interact with cool, dry air above it
T
Hint
Answer
Fog that is the greatest concern
Advection/Radiation
Fog that is the least concern
Steam
Things to take a look at when forecasting for fog
Radiation/Hydrolapse profile/Mixing/Crossover temperature
T or F: The crossover temperature is the lowest dewpoint temperature observed during the warmest part of the day
T
If the ground temperature is colder than the crossover temperature, there is a ______ fog risk
Greater
If the ground temperature is warmer than the crossover temperature, there is a ______ fog risk
Smaller
What the Modified Richardson Number looks at
Turbulence
If MRI is <= .025, the layer is _____
Mixy
If MRI >= .040, the layer is ______
Decoupled
If Air Temp = Crossover Temp, there will be _______ of visibility
1-3SM/1-3 SM
If Air Temp <= Crossover Temp, there will be ______ of visibility
1-2SM/1-2 SM
T or F: Meteograms are a timelapse of weather conditions, and are useful for identifying things such as frontal passages, cloud layers, and cold air damming
T
Fog is heavily reliant on ________ forecasting
Persistence
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