Plain English Meaning
Looking at the weather picture as a whole and working out what it means for the flight you are about to make.
Full Definition
The process of gathering, evaluating, and interpreting weather information — including reports, forecasts, charts, and observed conditions — to determine how current and expected weather will affect a planned flight.
Context Anchor
Used during preflight planning, scenario-based training, and any go-or-wait decision where weather could affect the flight.
Derivation
From Greek 'analusis' meaning 'a breaking up' — taking something complex apart to understand it. In aviation, the pilot breaks the weather picture into its parts (winds, ceilings, , , , ) and then reassembles it into a of what the flight will encounter.