Definition
The state of the atmosphere at a given time and place, described by conditions such as wind, temperature, visibility, cloud cover, precipitation, and pressure. In aviation use, WTHR appears in NOTAMs, METARs, briefings, and ATC communications as a shorthand reference to current or forecast atmospheric conditions affecting flight.
Plain English
What the air and sky are doing right now or are expected to do — wind, clouds, rain, visibility, and so on. WTHR is just the abbreviation pilots see in print and on screens.
Context Anchor
Seen in aviation notices, briefings, and other space-limited aviation text where weather information is written in shortened form.
Derivation
Weather comes from an Old English word meaning the condition of the air or sky. WTHR is a shortened written form that keeps the main consonants so the meaning can be recognized quickly in aviation text.
Why Pilots Care
Weather directly determines whether a flight can be conducted safely and legally, and rapid changes can require immediate decisions in flight.
Intuition Check
Do not read WTHR as the name of a specific weather report. It simply means weather or weather-related conditions in shortened aviation text.
Example Sentence 1
The NOTAM advised pilots to check current WTHR before departing due to rapidly changing conditions in the area.
Example Sentence 2
Unexpected WTHR along the route caused the pilot to request a diversion to a nearby airport.