113 practice questions on Weather Reports & Charts with answers and explanations, plus the key concepts and formulas, from the TrueHeading question bank.
Use this page to revise Weather Reports & Charts for the DGCA Aviation Meteorology paper. Below are the key ideas first, then 12 practice questions with answers and explanations, picked from the 113 questions in the TrueHeading bank for this topic.
In short: Groups in order: station, time, wind, visibility, weather, cloud, temperature and dew point, pressure, trend.
Open the full set in the student zone to answer every question, track your accuracy and take timed mock tests.
6 ideas to know cold.
Groups in order: station, time, wind, visibility, weather, cloud, temperature and dew point, pressure, trend.
Tip: Cloud heights are above aerodrome level, in hundreds of feet.
A forecast for an aerodrome, valid 6 to 30 hours (commonly 9, 24 or 30).
Intensity and descriptor with phenomenon:
Different warnings and reports:
Station, time, wind, visibility, RVR, weather, cloud, temperature/dew point, QNH, trend.
TAF: aerodrome forecast (9–30 h). TREND: 2-hour landing forecast attached to the METAR. SIGMET: warning of en-route hazards (validity ≤ 4 h; 6 h for cyclone/ash).
Tap “Show answer” after you have tried each one.
Answer: D. From 330° at 18 kt
The first three digits are the direction the wind blows FROM (true, degrees). The next two digits are the mean speed, then an optional G and the gust speed; KT means knots.
Answer: C. From 020° at 32 kt
The first three digits are the direction the wind blows FROM (true, degrees). The next two digits are the mean speed, then an optional G and the gust speed; KT means knots.
Answer: D. 800 m
Visibility is given in metres: steps of 50 m up to 800 m, 100 m up to 5 km, then 1 km steps. 9999 means 10 km or more.
Answer: C. 1–2 oktas at 4 000 ft above aerodrome level, cumulonimbus
Cloud heights are in hundreds of feet above aerodrome level (not MSL). FEW 1–2, SCT 3–4, BKN 5–7, OVC 8 oktas. CB and TCU are the only cloud types added to the group.
Answer: D. no significant cloud
NSC is used when there is no cloud below 5 000 ft or MSA, no CB or TCU, and CAVOK does not apply.
Answer: B. Temperature 37 °C, dew point 34 °C
Temperature comes first, then the dew point, both in whole °C. A leading M means minus.
Answer: B. mist
Intensity (− light, + heavy), descriptors (TS, SH, FZ, MI, BC, VC) and phenomena (RA, SN, FG, BR, HZ…) combine to form the present-weather group.
Answer: B. freezing fog
Intensity (− light, + heavy), descriptors (TS, SH, FZ, MI, BC, VC) and phenomena (RA, SN, FG, BR, HZ…) combine to form the present-weather group.
Answer: D. duststorm
Intensity (− light, + heavy), descriptors (TS, SH, FZ, MI, BC, VC) and phenomena (RA, SN, FG, BR, HZ…) combine to form the present-weather group.
Answer: C. of the conditions at the aerodrome at the time stated
METAR = aerodrome routine meteorological report; TAF = aerodrome forecast.
Answer: A. temporary fluctuations, each lasting less than one hour, and together covering less than half of the stated period
TAF change groups: BECMG gradual; TEMPO short-lived fluctuations; FM a rapid change from a given time; PROB30/40 give probability.
Answer: D. cancellation of the previous TAF
TAF change groups: BECMG gradual; TEMPO short-lived fluctuations; FM a rapid change from a given time; PROB30/40 give probability.
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