How do you interpret METAR sky conditions and visibility for flight planning?

• A. Wind direction is the only important factor
• B. METAR indicates fuel levels
• C. Read cloud layers, bases, tops, and visibility to assess VFR/IFR
• D. METAR is not used for planning

Answer: (C)

Reading METAR sky conditions and visibility tells you whether you’ll be flying in visual conditions or instrument conditions, and it guides how you plan legs, altitudes, and options. The METAR conveys cloud coverage and the height of the cloud bases, which determine the ceiling you’d be flying under or above, and it also reports visibility in miles. By noting the cloud layers and their bases, you can judge how much of the sky is obstructed and how low you would be in relation to the clouds along your route. The tops of those clouds give a sense of how tall the cloud deck might be, which helps you anticipate storm potential or towering clouds that could affect route and altitude decisions. The visibility figure tells you how far you can see; together with cloud bases, it indicates whether you’re likely to maintain VFR separation from clouds or if you’d be operating under instrument conditions.

If the METAR shows high bases and good visibility, you’re typically able to plan for VFR flight and choose a route and altitude that keep you clear of clouds. If the report shows low ceilings or very poor visibility, IFR conditions are likely, and you’d plan accordingly by considering IFR alternatives or an alternate destination. Remember, METAR is a snapshot, so you’ll compare it to minima and also check the forecast and updates as you plan.