Precipitation
Precipitation is any form of water that is present in the atmosphere. It is a class of hydrometeors, which are atmospheric water phenomena. Precipitation can be in many forms ranging from snow to fog.
Precipitation static (P-static). A form of radio interference caused by rain, snow, or dust particles hitting the antenna and inducing a small radio-frequency voltage into it.
Precipitation static (P-static)
Precision approach
Precision approach path indicator (PAPI) ...
Precipitation: The frontal rain or snow is usually narrow, especially if it is showery in character. Icing in the turbulent cumulus clouds can be severe.
line squalls ...
Precipitation
The rate at which precipitation is either measure or judge to be falling. Winter precipitation is a key factor in estimating the Holdover Time for an anti-icing fluid. It is the indication of moisture content.
Precipitation: A general meteorological term for the forms in which water may fall after condensation from the atmosphere. Precipitation may take the form of rain, drizzle, snow or sleet.
[edit] Precipitation accumulation
The original precipitation accumulation measuring device used for automated airport weather stations was the heated tipping bucket.
Precipitation in winter time is frozen above the freezing level and usually just plain wet below that. Only aircraft allowed to fly in known icing conditions can legally do so, it may not be smartest thing to do, however.
PRECIPITATION- Any or all forms of water particles (rain, sleet, hail, or snow) that fall from the atmosphere and reach the surface.
PRECISION APPROACH-
(See PRECISION APPROACH PROCEDURE.) ...
During the day, EVS penetrates haze, fog, smoke and precipitation up to 10 times farther than the unaided human eye. On the ground, EVS allows pilots to see animals or unlit obstacles during night taxi or takeoff.
Automated sensors record wind direction and speed, visibility, cloud ceiling, precipitation, etc. Data is sent automatically to the National Weather Service.
IMC (Instrument Meteorological Conditions) Weather conditions that preclude visual flight. Clouds, fog, heavy precipitation, smoke, and volcanic ash can all produce IMC.
The air cools adiabatically as it rises. When it cools to its dew point, clouds and precipitation result. The latent heat of condensation makes the air warmer than its surroundings, strengthening the updraft.
CAVOK - pronounced CAV okay (ceiling and visibility OK), visibility at least ten kilometres, with no cloud below 5,000 feet, with no Cbs, precipitation, thunderstorms, shallow fog or low drifting snow.
 See also: Aircraft, Speed, Flight, Direct, Aviation
  
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