What is meant by variable visibility?

Prepare for the 106 Surface Observation Fundamentals Exam with flashcards and multiple choice questions. Each question includes hints and detailed explanations. Boost your study efficiency today!

Variable visibility refers to a condition in which the prevailing visibility is not constant, but instead fluctuates between different reportable values. This means that, over a given period, the distance one can see may change, often due to varying atmospheric conditions such as fog, rain, or other visibility-reducing phenomena.

In the context of surface observations, variable visibility is significant because it can impact aviation operations and safety, requiring accurate reporting to ensure pilots and air traffic controllers are aware of changing conditions. Understanding this concept is essential for proper interpretation of weather observations and for making informed decisions regarding flight operations.

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