AVWXSVCS Flashcards
When are Terminal Aerodrome Forecasts (TAFs) issued?
0000z
0600z
1200z
1800z
FAA-H-8083-28, Aviation Weather Handbook
When are METARs issued?
Hourly, typically at approximately 50-55 minutes past the hour.
FAA-H-8083-28, Aviation Weather Handbook
What times are Winds and Temperature Aloft Forecasts (FB) issued?
0000z Based on 0000z data
0600z Based on 0000z data
1200z Based on 1200z data
1800z Based on 1200z data
FAA-H-8083-28, Aviation Weather Handbook
Describe the intensity of turbulence contained in an AIRMET
Moderate
FAA-H-8083-28, Aviation Weather Handbook
Describe the intensity of icing contained in an AIRMET
Moderate
FAA-H-8083-28, Aviation Weather Handbook
List phenomena which can be contained in a SIGMET
A SIGMET advises of non−convective weather potentially hazardous to all aircraft.
(a) Severe icing not associated with thunderstorms.
(b) Severe or extreme turbulence or clear air turbulence (CAT) not associated with thunderstorms.
(c) Widespread dust storms or sandstorms lowering surface visibilities to below 3 miles.
(d) Volcanic ash
SIGMETs are unscheduled and valid for 4 hours when issued, with updates and corrections issued as necessary.
FAA-H-8083-28, Aviation Weather Handbook
List phenomena which can be contained in a Convective SIGMET
Convective SIGMETs are issued for Severe or embedded thunderstorms with the potential for any of the following:
Surface winds greater than or equal to 50 knots
Hail greater than or equal to 3 / 4 inch in diameter
Tornadoes
FAA-H-8083-28, Aviation Weather Handbook
From which source(s) must weather information be obtained?
Weather information must be prepared by the U.S. National Weather Service or a source approved by the U.S. National Weather Service
§121.101 Weather reporting facilities.
Identify and describe this weather product
Convective Outlook
Indicates the potential for severe and non-severe convection and specific severe weather threats during the following 8 days.
MRGL: marginal risk
SLGT: slight risk
ENH: enhanced risk
MDT: moderate risk
HIGH: high risk
Identify this weather product
KOKC 011955Z AUTO 22015G25KT 180V250 3/4SM
R17L/2600FT +TSRA BR OVC010CB 18/16 A2992 RMK AO2 TSB25 TS OHD MOV E SLP132
METAR (Aviation Routine Weather Report.
The METAR report includes surface observations for the terminal (airport) area. A METAR report includes the airport identifier, time of observation, wind, visibility, Runway Visual Range (RVR), present weather phenomena, sky conditions, temperature, dewpoint, and altimeter setting.
What is a SIGMET?
Significant Meteorological Information (SIGMET).
A SIGMET is a concise description of the occurrence or expected occurrence of specified en route weather phenomena that may affect the safety of aircraft operations.
SIGMET (Non-Convective) Issuance Criteria:
-The following affecting or are expected to affect an area of at least 3,000 square miles.
• Severe or greater turbulence (SEV TURB).
• Severe icing (SEV ICE).
• Widespread duststorm (WDSPR DS).
• Widespread sandstorm (WDSPR SS).
• Volcanic ash (VA).
What is a convective SIGMET?
Convective SIGMETs are issued for thunderstorms affecting or expected to affect an area of at least 3,000 square miles.
A Convective SIGMET implies severe or greater turbulence, severe icing, and low-level windshear.
What is an AIRMET?
Airmen’s Meteorological Information (AIRMET).
An AIRMET is a concise description of the occurrence or expected occurrence of specified en route weather phenomena that may affect the safety of aircraft operations.
An AIRMET may be issued when any of the following weather phenomena are occurring or are expected to occur over an area of at least 3,000 square miles:
• Ceiling less than 1,000 ft and/or visibility less than 3 SM (IFR). o Weather phenomena restricting the visibility
• Widespread mountain obscuration.
o Weather phenomena causing the obscuration
• Moderate turbulence.
• Sustained surface wind greater than 30 kts.
• Moderate icing.
• Non-Convective low-level wind shear.
List types of AIRMETS
Sierra: IFR conditions or mountain obscuration
Tango: Moderate turbulence
Zulu: Moderate icing
FAA-H-8083-28, Aviation Weather Handbook
Identify and describe this weather product
KPIR 111140Z 1112/1212 13012KT P6SM BKN100 WS020/35035KT TEMPO 1112/1114 5SM BR
FM111500 16015G25KT P6SM SCT040 BKN250
FM120000 14012KT P6SM BKN080 OVC150 PROB30 1200/1204 3SM TSRA BKN030CB
Terminal Aerodrome Forecast (TAF)
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Wind and Temperature Aloft Forecast (Graphic)
Computer-prepared forecasts of wind direction, wind speed, and temperature at specified times, altitudes, and locations.
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Short-Range Surface Prognostic (Prog) Chart
Graphic forecast for surface pressure systems, isobars, fronts, and precipitation for a 2½-day period.
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Low-Level Significant Weather (SIGWX) Charts
A 12-Hour forecast of aviation weather hazards, weather flying categories, turbulence, and freezing levels.
The forecast covers altitudes FL240 and below.
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Current Icing Potential/Forecast Icing Potential (CIP/FIP)
Geographic depiction of icing potential
SLD=Super Cooled Droplets (high potential for freezing rain)
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Graphic Turbulence Guidance (GTG-2)
Forecast for non-convective turbulence
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Mid-level SIGWX chart
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High-level SIGWX chart
