REPORTABLE SKY COVER DEFINITIONS Abbreviation Meaning Coverage W Vertical Visibility
8/8 SKC or CLR Clear 0 FEW Few 1/8-2/8 SCT Scattered 3/8-4/8 BKN Broken 5/8-7/8 OVC Overcast 8/8
Five hundred feet of vertical visibility
only translates to 500 feet of horizontal visibility, A tight, low-altitude 360 in rotten visibility is a preamble to an accident report.
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.
Weather in the area was widely report to include 1/4 mile visibility; fog; sky obscured; vertical visibility
(VV) is the distance a person can see vertically into an obscuring phenomena.
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.
At 0153, an automated weather observation included % miles visibility with mist and 200 feet vertical visibility
That's one of the reasons the "ceiling obscured" terminology describing a low, indefinite ceiling on the old sequence reports was replaced with vertical visibility
in the newer Metar format.