Definition
Air containing turbulence — rapid, irregular movements of the atmosphere that cause an aircraft to be jolted, bounced, or displaced from its flight path. Rough air can be caused by thermals rising from heated terrain, wind flowing over obstacles or terrain features, wind shear, frontal activity, or wake turbulence from other aircraft.
Plain English
Bumpy, unsettled air that shakes the aircraft around as it flies through.
Context Anchor
You may encounter this term in training discussions about student comfort, motion sickness, weather, and when deciding whether conditions are suitable for a lesson.
Derivation
Rough originally meant uneven or not smooth. That helps here because rough air is air that gives the airplane an uneven, not-smooth ride.
Why Pilots Care
Rough air produces physical discomfort and can trigger airsickness, reducing a pilot's ability to maintain precise control and situational awareness.
Grounding Statement
In rough air, the airplane is still flying in air, but the air is moving unevenly enough that the ride feels bumpy.
Intuition Check
Rough air does not mean the air is physically scratchy or damaged. It means the air is moving unevenly, so the airplane does not ride smoothly through it.
Example Sentence 1
The instructor delayed the introductory flight until late afternoon when the thermals had eased and the rough air over the desert had settled down.
Example Sentence 2
Passengers were briefed to keep seat belts fastened because of forecast rough air over the mountains.