50 10 Meterological Services Flashcards
Name the different parts of the World Area Forecast System (WAFS) and what they provide
- World Area Forecast Centres: Upper Air Forecasts (SIGWX)
- Met Offices: TAF
- Met Watch Offices: SIGMET, AIRMET
- Aeronautical Met Stations: METAR
- Volcanic Ash Advisory Centres
- Tropical Cyclone Advisory Centres
- Data collected from AC
What is the AMDAR system?
- Aircraft Monitoring Data Relay
- Receives transmissions from AC regarding current weather conditions
Name and give the following information for Routine Reports
- How often they are issued
- How long they are valid for
METAR’s:
- Issued every 30 to 60 mins
TREND:
- Valid for 2 hours
- Added to the end of a METAR
SPECI:
- Change of operational significance
- Issued between METAR’s
Name and give the following information for Routine Forecasts
- How often they are issued
- How long they are valid for
TAF:
- Issued every 3 to 6 hours
- Valid for 9 to 36 hours
SIGWX:
- Issued every 6 hours
- Upper air levels
GAFOR
- Low level visibility and cloud
- Valid for 6 hours
- General aviation forecast for a specific region
Name and give the following information for Warning Reports
- What are they for
- How long they are valid for
SIGMET:
- Upper air levels
- Valid for 4 hours
AIRMET / GAMET:
- Low air levels
- Valid for 6 hours
SNOWTAM:
- AF conditions due to snow/slush/ice
- Valid for 24 hours
ASHTAM:
- Volcanic activity and ash clouds
- Valid for 24 hours
Aerodrome Warning:
- Conditions effecting AC and facilities on the ground
On a METAR are temperatures and Pressure Readings rounded up or down?
- Temperatures are rounded up
- Pressures (QNH) are rounded down
What is the code breakdown on a Runway State report?
- RR T E DD BB
- R: Runway designator
- T: Type of deposit
- E: Extent of the deposit
- D: Depth of the deposit
- B: Breaking conditions
How often is the Wind Sheer warning updated?
Every Minute
What is the difference between ATIS and VOLMET?
- ATIS provides information for a specific aerodrome
- VOLMET provides information for a range of aerodromes
The wind direction on a METAR is determined according to True North or Magnetic North?
True North
Main cloud base refers to what level of cloud on a METAR?
The highest cloud given
What warning would a squall line be reported in?
SIGMET
In what reports/forecasts/warnings is severe icing reported in?
- SIGWIX (Significant Weather Charts)
- SIGMET: for AC in the air
What is a TREND forecast?
- Landing forecast appended to a METAR or a SPECI
- Valid for 2 hours
What does ‘NOSIG’ mean?
- No significant changes
- A TREND on the end of a METAR
