Aviation Weather Forecast Flashcards
What is aviation area forecast?
A forecast of visual meteorological conditions, clouds and general weather conditions over area of the size of several states.
Issued 3 times a day, for 6 areas of 48 states.
What is a terminal aerodrome forecast (TAFs)?
A concise statement of weather conditions in 5 SM radius from center airport.
During 24 hours time frame.
What information is provided by aviation area forecasts?
Synopsis
Clouds & weather
12-18 hour categorical outlook
What are in-flight aviation weather advisories?
Forecasts that advise enroute aircraft of developing hazardous weather.
What is a convective SIGMET?
Implies severe/greater turbulence, severe icing, & low level wind shear.
Surface winds greater than or equal to 50 knots
Hail
Embedded thunderstorms
Line of thunderstorms
Thunderstorms affecting 40%/> area of 3,000 sq mi
What is a SIGMET?
Advises of non-convective weather that’s potentially hazardous to all aircraft.
CAT: clear air turbulence
Dust/sandstorms
Volcanic ash
Severe icing not associated with t-storms
What is a AIRMET?
Conditions at intensities lower than SIGMETs.
Issued every 6 hours.
What is AIRMET Sierra?
Mountain obscurations
What is AIRMET Tango?
Moderate turbulence, sustained surface winds of 30 kn or greater, low level wind shear.
What is AIRMET Zulu?
Moderate icing and provides freezing level heights.
What is a winds and temperatures aloft forecast?
Computer prepared for forecast, wind direction, wind speed, temperature at specified times, altitude, and locations.
Prepared 4 times daily
What valuable information can be determined from wind and temperature aloft forecasts?
Most favorable altitude: based on winds and direction of flight.
Areas of possible icing.
Temperature inversions.
Turbulence.
What is a center weather advisory(CWA)?
Aviation warning to anticipate & avoid adverse weather conditions en route & terminal environments.
Short range forecast expected to begin 2 hours from that time.
