Plain English Meaning
A short tag meaning 'weather.' When you see /WX next to a route or location, it tells you the note attached is about weather affecting that area.
Full Definition
A route qualifier used in flight planning and Notices to Air Missions (NOTAM) coding to indicate that the associated information or routing is related to weather. When appended to a route or location identifier, it signals that the entry concerns weather conditions affecting that segment, fix, or area.
Context Anchor
Seen in PIREP formats in aviation weather reports, where each slash code marks a different part of ’s .