PCAA Meteorology study guide
PCAA Meteorology · Work through your exam, one topic at a time.
The PCAA Meteorology examination is the knowledge assessment used within Pakistan's civil aviation system to establish that a candidate understands the atmosphere well enough to support safe flight operations. It is most relevant to people preparing for meteorological observer or forecaster roles serving aviation, to air traffic services and flight dispatch personnel who must interpret weather products correctly, and to pilots and instructors who want their theoretical weather knowledge tested against a civil-aviation standard. The PCAA Meteorology study guide has 10 sections and about 2,505 words.
01The Atmosphere: Composition, Structure and Standard Atmosphere
This domain tests the physical baseline on which every altimetry and performance question rests: what air is made of, how temperature and pressure change with height, and how the ICAO Standard Atmosphere defines the reference values. Dry air is 78.08% nitrogen, 20.95% oxygen, 0.93% argon and about 0.04% carbon dioxide by volume.
273 words, about 1 min02Atmospheric Thermodynamics and Stability
This domain tests whether you can predict parcel buoyancy: dry and saturated lapse rates, humidity, and the resulting stability classification. DALR is 9.8°C/km (use 10 for mental arithmetic).
254 words, about 1 min03Pressure, Density and Altimetry
This domain tests the altimeter chain from station pressure to the height you fly, and the errors that make an altimeter read incorrectly. QFE is the pressure at aerodrome elevation.
229 words, about 1 min04Wind: Forces, Global Circulation and Local Effects
This domain tests the forces that create wind, the resulting patterns from planetary to local scale, and the rules that let you infer wind from the pressure field. The pressure gradient force drives air from high to low pressure, perpendicular to the isobars.
289 words, about 1 min05Clouds, Precipitation and Fog
This domain tests cloud identification, the weather each genus implies, and the conditions that bring visibility down. High cloud (above about 6 km): cirrus, cirrostratus, cirrocumulus - ice cloud with no significant precipitation.
250 words, about 1 min06Air Masses, Fronts and Synoptic Systems
This domain tests air-mass classification, the weather sequence at each frontal type, and the synoptic patterns that produce them. Source regions give continental Arctic or Polar (cold, dry), maritime Polar (cold, moist), maritime Tropical (warm, moist) and continental Tropical (hot, dry) air.
246 words, about 1 min07Weather Hazards to Aviation
This domain tests recognition and avoidance of icing, turbulence, thunderstorms and wind shear. Rime ice forms in small-droplet stratiform cloud, clear or glaze ice in large supercooled droplets in stratiform and convective cloud, and mixed ice in between.
244 words, about 1 min08Meteorological Observations, Reports and Codes
This domain tests fast, accurate decoding and encoding of METAR, SPECI, TAF, SIGMET and PIREP. Format: report type, ICAO station, time DDHHMMZ in UTC, wind dddffKT with G for gusts and VRB for variable, visibility in metres (9999 means 10 km or more), RVR, present weather (intensity, descriptor, precipitation, obscuration), cloud amount and height as FEW/SCT/BKN/OVC in hundreds of feet AGL, temperature and dew point, QNH as Qnnnn hPa, and a trend group (NOSIG, BECMG, TEMPO).
236 words, about 1 min09Weather Charts and Flight Documentation
This domain tests interpretation of the synoptic and upper-air products used for flight planning. Isobars are drawn at 4 hPa intervals with lows, highs, troughs, ridges and fronts.
236 words, about 1 min10Climatology of Pakistan and Regional Weather
This domain tests the seasonal regimes that shape operations from Karachi to Skardu. Western disturbances track from Iran and Afghanistan across Balochistan and the north, bringing rain to the plains and snow above roughly 1,500 m in Gilgit-Baltistan and Khyber Pakhtunkhwa.
248 words, about 1 min