Pilots invoke colorful, but not always official, terms to describe less-than-desirable weather. Think: "Skuzzy" "Stinko" and "Marginal." Marginal is the only one of those three with any official AIM blessing. What constitutes Marginal VFR (MVFR) in an Area Forecast's Categorical Outlook?


Ceiling greater than 3000 feet and visibility greater than 5 statute miles; includes sky "clear"


Ceiling 500 feet to less than 1000 feet or visibility 1 to less than 3 statute miles, or both


Ceiling 1000 to 3000 feet or visibility 3 to 5 miles inclusive, or both


Ceiling less than 500 feet or visibility less than 1 statute mile, or both

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