Definition
A designated aviation weather facility that maintains continuous watch over meteorological conditions affecting flight operations within a specified area of responsibility, and issues warnings of hazardous weather such as thunderstorms, severe turbulence, icing, volcanic ash, and tropical cyclones to aircraft in flight and to other aviation units.
Plain English
An aviation weather office that constantly monitors the weather over a defined area and sends out alerts when dangerous conditions develop that could affect flights.
Context Anchor
Seen in aviation weather services, international flight planning, and discussions of weather warnings for a flight information region.
Derivation
From Greek 'meteoron' (a thing high up, in the sky), which gives us 'meteorology' — the study of the atmosphere. 'Watch' here carries its older sense of standing guard and keeping a continuous lookout, which is exactly what the office does for hazardous weather.
Why Pilots Care
Pilots receive critical hazard alerts such as SIGMETs that originate from these offices, supporting safer route planning and in-flight decisions.
Intuition Check
Do not read this as simply a local weather office. In aviation, a Meteorological Watch Office has an assigned responsibility to monitor a region and support flight safety with aviation weather warnings.
Example Sentence 1
The Meteorological Watch Office issued a SIGMET for severe turbulence over the mountain range, prompting the crew to request a route change.
Example Sentence 2
Updated warnings from the Meteorological Watch Office were reviewed during the preflight weather check for the FIR.