Thunderstorms & Microbursts
A microburst typically lasts how long?
What is 5-15 minutes?
These clouds are associated with steady precipitation and IFR conditions.
What is Nimbostratus?
On an aviation weather chart, an occluded front is drawn as what colors/shapes?
What are purple lines with alternating semicircles and triangles
This is the most dangerous type of icing because it is clear, smooth, and hard to see.
What is clear ice?
In a METAR, “BR” means this.
What is mist?
Microbursts create this dangerous wind effect on takeoff/landing.
What is wind shear?
Towering cumulus clouds are a sign that this might develop.
What is thunderstorms/convection?
A dashed line on a surface analysis chart usually means this boundary.
What is a trough?
When warm, moist air flows over a cold surface, this type of fog forms.
What is advection fog?
METAR: OVC004 — what is the ceiling?
What is overcast 400 ft?
The most dangerous stage of a thunderstorm for pilots.
What is the mature stage?
These puffy, cotton-like clouds form by convection and generally indicate stable, fair weather.
Cumulus
This chart shows areas of IFR, MVFR, and VFR conditions using colored shading and is updated frequently.
What is a prog chart?
This condition occurs when the aircraft encounters visible moisture below freezing temperatures.
What is Airframe/structural icing.
–RA stands for this.
What is light rain?
The minimum recommended distance to remain away from a thunderstorm.
What is 20 NM?
A cloud layer that can hide embedded thunderstorms from pilots.
What is Altostratus or stratiform layers?
On a radar summary chart, the intensity levels of precipitation are shown using what?
What are Colors/shading
Fog requires moisture, cooling, and this additional factor.
What is light wind?
A METAR with TSRA means what conditions?
What is thunderstorm with rain?
The first sign of a microburst during takeoff may be a sudden increase in airspeed. What immediately follows?
What is a severe loss of airspeed and downdraft?
These clouds indicate mountain wave activity and severe turbulence.
What are Lenticular clouds
On a Prog Chart, the dashed lines labeled “ISOBARS” represent lines of equal what?
What is pressure?
This type of icing occurs inside the induction system and can happen above freezing temperatures.
What is carburetor icing?
If you see TEMPO in a TAF, what does it mean?
What is Temporary fluctuations expected.