Breaking the WEATHER CODE! (PPL Lesson 40)

Summary

Key Points

• Pilots must learn to decipher official weather products like METARs (Meteorological Aerodrome Reports) and TAFs (Terminal Aerodrome Forecasts) for flight safety and regulatory compliance. 1:03
• METARs provide current surface weather observations, including airport identifier, date/time (Zulu), wind direction/speed, visibility, significant weather, cloud cover, temperature/dew point, and altimeter setting. 2:03
• Wind information in METARs indicates direction (from where, in degrees) and speed (in knots), with 'G' denoting gusts, while visibility is reported in statute miles. 3:36
• Understanding METARs and TAFs is critical for pilots to ensure legal Visual Flight Rules (VFR) flight by meeting minimum visibility and ceiling requirements. 4:50
• Significant weather codes (e.g., RA for rain, TS for thunderstorms) often include qualifiers like '+' for heavy or '-' for light intensity, or 'VC' for in the vicinity. 6:28
• Cloud cover is reported as 'FEW', 'SCT', 'BKN' (broken), or 'OVC' (overcast); 'BKN' and 'OVC' layers constitute a ceiling, with heights given in hundreds of feet AGL (add two zeros). 12:04
• Temperature and dew point are always in Celsius, and the altimeter setting is a four-digit number representing inches of mercury (e.g., 2998 means 29.98). 12:52
• The 'RMK' (remarks) section provides additional details, such as automated station indicators ('A02', 'AUTO') or maintenance alerts ('$'). 13:24
• TAFs provide future weather predictions for an airfield, typically covering 24-30 hours, and are similar to METARs but omit temperature, altimeter settings, and most remarks. 15:15
• TAFs use 'FROM' lines to indicate significant weather changes and 'TEMPO' lines for temporary conditions, sometimes including 'PROB' for the probability of specific weather events. 18:39