vertical visibility


Also found in: Acronyms.

vertical visibility

[′vərd·ə·kəl ‚vis·ə′bil·əd·ē]
(meteorology)
According to United States weather observing practice, the distance that an observer can see vertically into a surface-based obscuring phenomenon, such as fog, rain, or snow.

vertical visibility

The maximum height from which a pilot can recognize ground features when the surface is obscured because of a meteorological phenomenon. The distance one can see upward in similar conditions.
References in periodicals archive ?
The instrument detects cloud bases, penetration degrees, boundary layer heights, vertical visibility, several layers of clouds and cirrus clouds.
This is a gradual purchase (supply) of special meteorological instruments for automated measurement of temperature, humidity and atmospheric pressure, wind speed and direction, cloud base height measurement, vertical visibility, clouds cover the sky, ground and weather conditions, visibility on automated weather stations ( AMS) Czech Hydrometeorological Institute.
At 0742, PAO's weather observation included variable wind at five knots, one-eighth of a mile visibility with fog and a vertical visibility of 100 feet.
Vertical visibility (VV) is the distance a person can see vertically into an obscuring phenomena.
At 0153, an automated weather observation included % miles visibility with mist and 200 feet vertical visibility.