INRAT Instrument Rating · Question
Scenario 15: A TAF includes a 'PROB30' group. What does this indicate?
In a TAF, 'PROB30' indicates a 30 to less than 50% probability of the specified weather phenomenon occurring during the forecast period. It highlights condition
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Question: Scenario 15: A TAF includes a 'PROB30' group. What does this indicate?
Answer options:
- A definite probability of 30% that the specified weather phenomenon will occur.
- A 30% chance of the specified weather phenomenon occurring and remaining for a short period.
- A 30% chance that the specified weather phenomenon will occur, but not definitely. ✅ The probability of the specified weather occurring is between 30% and 50%.
Correct answer: The probability of the specified weather occurring is between 30% and 50%.
Explanation: In a TAF, 'PROB30' indicates a 30 to less than 50% probability of the specified weather phenomenon occurring during the forecast period. It highlights conditions that are possible but not definite. The correct answer is "The probability of the specified weather occurring is between 30% and 50%.". This capacity-fill scenario 15 reinforces the same competency for the inrat bank and follows the certified explanation standard.
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Question explanations
- When flying an NDB approach, what instrument is primarily used to track the inbound course?
- How does an aneroid barometer in an altimeter respond to a change in atmospheric pressure?
- What is the primary characteristic that differentiates a Localizer Performance (LP) approach from a Localizer
- When interpreting a TAF (Terminal Aerodrome Forecast), what does 'PROB30' indicate?
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