Definition
A category of weather information used directly in flight planning and the conduct of flight operations. OPMET data includes reports and forecasts such as METAR, TAF, SIGMET, AIRMET, and other aviation weather products distributed through international channels for pilots, dispatchers, and air traffic services.
Plain English
Weather information packaged specifically for use in flying — the reports and forecasts pilots and controllers actually use to plan and run flights.
Context Anchor
Seen in aviation weather services, flight planning, dispatch, and international weather-information systems.
Derivation
Operational means 'related to active operations or use,' and meteorological comes from the Greek 'meteoron' (something high in the air) — the science of weather. Together, the term means weather information intended for active use in flight, as opposed to general or research weather data.
Why Pilots Care
Gives pilots the timely, relevant weather data needed to judge whether a flight can be conducted safely.
Intuition Check
Operational Meteorological does not mean weather that is somehow “working” or active. It means weather information intended for practical use in real flight operations.
Example Sentence 1
The dispatcher pulled the latest OPMET data before releasing the flight to confirm conditions along the route.
Example Sentence 2
Operational meteorological products are updated on a fixed schedule so dispatch can evaluate alternate airports.