Advisory circulars from the FAA used to be sent to pilots via the U.S. mail. They were printed on blue paper and sometimes arrived with such frequency you felt like you were on Hogan’s Heroes—every message that the characters on that classic TV show got from London came on blue paper.
A great many of those ACs focused on weather—how to get a good weather briefing, mountain flying, thunderstorms, etc. Now all that information is available in FAA-H-8083-28, the newly updated version of the Aviation Weather Handbook.
