Glossary
Aviation Weather
Ceiling
Definition
The height of the lowest layer of clouds covering more than half the sky
Related Terms
Decision Height (DH)
The altitude during a precision approach at which the pilot must decide to land or go around
Fog
Visibility-reducing water droplets suspended near the surface, a major cause of airport delays
METAR (METAR)
Aviation Routine Weather Report — a standardized format for reporting current weather conditions
Visibility (VIS)
The greatest distance at which prominent objects can be identified with the unaided eye