Definition
The side of an object, terrain feature, or aircraft that faces away from the oncoming wind. On the leeward side, the air is sheltered from the wind and is typically disturbed, turbulent, or descending after flowing over the obstacle.
Plain English
The downwind side — the side away from where the wind is blowing from. If wind hits the front of a hill, the leeward side is the back.
Context Anchor
Used when discussing wind flow around terrain, buildings, trees, or other obstructions, especially where rough air may form on the downwind side.
Derivation
From Old English 'hleo' meaning shelter or protection. The leeward side is the sheltered side — the side protected from the wind by the object itself.
Why Pilots Care
Aircraft on the leeward side may experience strong downdrafts and severe turbulence, especially near mountains.
Grounding Statement
If wind blows across a ridge, the side after the wind crosses the ridge is the leeward side.
Intuition Check
Leeward does not automatically mean calm or safe. It means the side after the wind passes the object, and that side can still have rough or sinking air.
Example Sentence 1
The pilot avoided the leeward side of the ridge because of the expected downdrafts and turbulence.
Example Sentence 2
The leeward slope often experiences different wind patterns than the windward side during mountain flying.