Definition
Irregular motion of an aircraft caused by disturbances in the surrounding air, ranging from light bumps to violent jolts capable of momentarily disrupting control. It is produced by atmospheric conditions such as convective currents, wind shear, mountain waves, frontal activity, jet streams, and wake from other aircraft.
Plain English
Bumps and jolts felt while flying because the air the aircraft is moving through is not smooth.
Context Anchor
Used in instrument weather flying, weather briefings, pilot weather reports, and air traffic control reports when pilots are planning for or flying near clouds, fronts, mountains, strong winds, or thunderstorms.
Derivation
From the Latin 'turbulentus,' meaning 'restless' or 'disturbed.' The aviation use carries the same idea — the air itself is restless, and the aircraft feels it.
Why Pilots Care
Unmanaged inflight turbulence can cause loss of control, structural stress, or injuries to crew and passengers.
Analogy
It is like driving over an uneven road: the vehicle may still be under control, but the surface makes the ride rough and requires more attention.
Grounding Statement
Picture the airplane entering air that is rising, sinking, and swirling in small patches; each patch nudges the aircraft a different way.
Intuition Check
Do not assume turbulence means the aircraft is out of control. It means the air is disturbed enough to move the aircraft unexpectedly; how serious it is depends on the strength of that disturbance.
Example Sentence 1
The crew turned on the seatbelt sign after encountering moderate inflight turbulence while crossing the mountains.
Example Sentence 2
During the approach the crew briefed the passengers about possible inflight turbulence near the thunderstorm line.