When visibility exceeds 6 statute miles (SM) on a TAF, how is it expressed?

When visibility exceeds 6 statute miles (SM) in a Terminal Aerodrome Forecast (TAF), it is expressed as "P6SM." The “P” stands for "plus," indicating that visibility is greater than 6 statute miles. This notation is important for pilots and meteorologists as it clearly communicates that visibility conditions are favorable and exceed a specific threshold, enhancing situational awareness for flight operations.

Other options, like “6SM,” simply denote a visibility of exactly 6 statute miles and do not convey the information that conditions exceed that amount. “G6SM” and “R6SM” are not standard expressions related to visibility in TAFs and would not provide the correct indication of visibility exceeding 6 statute miles. Therefore, the correct notation of "P6SM" serves a crucial purpose in weather communication, ensuring that all parties are aware that visibility surpasses a key metric for flight safety.