Instrument Rating Exam · Practice

A TAF includes 'PROB30 TEMPO' for a certain period. How should a pilot interpret this for planning purposes?

• A.PROB30 means the forecaster is completely certain the condition will occur for exactly 30% of the forecast period
• B.A 30% probability of the temporary conditions — lower than TEMPO alone, less significant for planning but still considered
• C.PROB30 conditions are always disregarded entirely for both IFR fuel and alternate planning purposes
• D.PROB30 means the temporary condition will persist for individual periods of 30 minutes or less each