Met Services For Aviation Flashcards
List the met reports available for aviation
METAR SPECI TAF AD Warning Wind shear warning
How often is a METAR published?
Every 30 minutes
What is a SEPCI for?
Weather improvement or deterioration
Also required after crash
TAFs?
Prepared every 3 hours for 9 hour period
24 or 30 hour tafs for long haul periods
Issued at 6 hour intervals
Trends: significant expected changes over next 2 hours
What required an AD warning?
Gale/Strong winds Squalls TS GR Fog SN/frost FZ RA
Remain in force for validity of stated period
Wind shear reports?
Pilot reports
Speed loss/gain/duration/effect of a/c
Cancelled when pilot says it no longer exists
Marked temperature inversion
When 10 degrees + exist up to 1,000ft agl I
SIGMET
Actual/anticipated weather conditions that could effect safety
Valid 4 hours
SIGMET subsonic
- active TS
- FZ RA
- Severe Turbulence
- Severe Mountain Waves
- Heavy dust/sandstorms
- tropical cyclone
- Heavy Hail
- severe icing
- volcanic ash
SIGMET Transonic
- Mod/Severe Turbulence
- CB clouds
- Hail
- Volcanic Ash
Met office prepare and send SIGMET to ACC/FIC
True
ACC/FIC pass SIGMET to a/c in flight 500nm ahead or 2 hours flying
Time ahead.
True
Pilots should report when
AIREP
Severe Turbulence/ice
Mountain waves/TS/volcanic ash
Anything that could effect safety
ATIS
VHF
AD status
Current weather
ATIS info code
Met Bulletins Headings
Via AFTN or MONTE
SA- Routine AD report
SP- Selected Special Report
FT- AD forecast valid for 18-24 hours
FC - AD forecast valid 9-12 hours
AD met office provides information on?
Forecasts Continuous survey of AD conditions Bulletins/consultations/flight docs Relevant information Supply other met info to Aeronautical users Display avbl met info/exchange info
What does the Met Watch office do?
Overview of met conditions
Prepare/supply/disseminate SIGMET
Supply volcanic ash info
Supply info about accidental release of radioactive materials
What does the WAFC do?
UK operates one for Europe
Responsible for the global forecast of significant weather e.g
Wind Temp Humidity Tropopause height max W/V direction n height
What are AIRMETs?
Routine forecasts in plain language on dedicated frequency or ATIS
Valid 6 hours
Comprehensive selection of current weather less severe than SIGMET.
ATC will only supply information given by met office except for
Indicates wind speed/direction
RVR observation
Controller observation of sudden deterioration
A/C reported weather hazards
Cloud Echoes on Radar
Official Met Observation
Unofficial Met observation
