Weather

Question 1

METAR:
   CLR
   BR
   RA
   SN
   BKN
   FEW
   OVC
   FU

Answer 1

METAR:
   Clear
   Mist
   Rain
   Snow
   Broken (ceiling)
   Few
   Overcast (ceiling)
   Smoke/Fumes

Question 2

PIREP

Answer 2

Pilot report

time, location/altitude, aircraft, phenomenon

Question 3

Inflight Weather Advisories

Answer 3

AIRMET
SIGMET
Convective SIGMET

Question 4

AIRMET (WA)

Answer 4

Hazards to light aircraft
Valid for 6 hours
Moderate icing
Moderate turbulence
Sustained surface winds of 30 knots or greater
Widespread ceilings less than 1,000 feet
Widespread visibilities less than three miles
Extensive mountain obscurement
Sierra: IFR and mountain obscuration
Tango: turbulence, winds > 30kt
Zulu: icing and freezing levels

Question 5

SIGMET (WS)

Answer 5

Non-convective weather potentially hazardous to all aircraft
Valid for 4 hours
Severe icing not associated with thunderstorms
Severe turbulence not associated with thunderstorms
Visibility < 3sm due to dust storms or sand storms or volcanic ash
Winds > 50kt

Question 6

Convective SIGMET (WST)

Answer 6

Hazardous convective weather that affects the safety of every flight
Valid for 2 hours
Hail greater ¾”
Tornadoes
Embedded thunderstorms
Lines of thunderstorms
Thunderstorms with heavy or greater precipitation that affect 40 percent or more of a 3,000 square mile or greater region

Question 7

Three stages of a thunderstorm

Answer 7

Cumulus Stage (15 minutes)
Mature Stage (most violent)
Dissipating Stage (anvil-like cloud shape)

Question 8

Clouds

Answer 8

Stratus - low level - surface to 6,500’
Alto - mid level - 6,500’ to 20,000’
Cirrus - high level - > 20,000’

Question 9

Fog

Answer 9

Steam
Upslope
Radiant
Advection
Precipitation

Question 10

Carburetor Icing

Answer 10

High carburetor icing potential above 80% humitity below 70F.
Carburetor temperature yellow arc is 5F to 41F