Definition
A judgment a pilot makes about whether to begin, continue, divert, or terminate a flight based on current and forecast weather conditions, considering the pilot's qualifications, the aircraft's capabilities, and the operational risk involved.
Plain English
A choice the pilot makes about flying based on the weather — whether to go, keep going, change route, or stop — taking into account their own skill level and what the aircraft can safely handle.
Context Anchor
Used in preflight planning, in-flight decision-making, and instructor discussions about safe judgment.
Derivation
Weather comes from an old English word meaning air, wind, or storm conditions. Decision comes from a Latin root meaning to cut off, which fits the aviation use: a pilot chooses one safe path and cuts off unsafe options.
Why Pilots Care
Weather decisions are a leading factor in general aviation accidents; consistently sound ones reduce risk and improve outcomes.
Grounding Statement
If the weather no longer fits the flight you planned, the weather decision is the choice you make next.
Intuition Check
A weather decision is not just noticing that the weather is good or bad. It means making a specific flight choice because of the weather.
Example Sentence 1
After reviewing the latest forecast showing a line of thunderstorms along the route, the pilot made the weather decision to delay the flight by three hours.
Example Sentence 2
During the cross-country flight the student practiced making a weather decision to divert when thunderstorms developed ahead.