What does "V" represent in TAF reports concerning visibility?

In TAF reports, "V" stands for Variable visibility. This term indicates that the visibility is not constant and can change significantly over a short period or distance. In a TAF report, if visibility is described as variable, it may suggest fluctuations due to conditions such as weather, terrain, or other environmental factors.

The concept of variable visibility is crucial for pilots and air traffic controllers as it impacts flight safety and operational decisions. While visibility in statute miles is a common measurement, "V" specifically denotes variability, emphasizing that the conditions could differ considerably even within the same reporting area. Hence, understanding "V" in TAF helps aviation professionals anticipate and respond to changing flight conditions effectively.