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  2. Cloud base - Wikipedia

    en.wikipedia.org/wiki/Cloud_base

    A cloud base (or the base of the cloud) is the lowest altitude of the visible portion of a cloud. It is traditionally expressed either in metres or feet above mean sea level or above a planetary surface, or as the pressure level corresponding to this altitude in hectopascals (hPa, equivalent to the millibar ).

  3. Dew point - Wikipedia

    en.wikipedia.org/wiki/Dew_point

    General aviation pilots use dew point data to calculate the likelihood of carburetor icing and fog, and to estimate the height of a cumuliform cloud base. Increasing the barometric pressure raises the dew point. [10]

  4. Cloud height - Wikipedia

    en.wikipedia.org/wiki/Cloud_height

    The cloud height, more commonly known as cloud thickness or depth, is the distance between the cloud base and the cloud top. [1] It is traditionally expressed either in metres or as a pressure difference in hectopascal (hPa, equivalent to millibar ).

  5. Ceilometer - Wikipedia

    en.wikipedia.org/wiki/Ceilometer

    Since the instrument will note any returns, it is possible to locate any faint layer where it occurs, additionally to the cloud's base, by looking at the whole pattern of returned energy. Furthermore, the rate at which diffusion happens can be noted by the diminishing part returned to the ceilometer in clear air, giving the coefficient of ...

  6. Lifting condensation level - Wikipedia

    en.wikipedia.org/wiki/Lifting_condensation_level

    In nature, the actual cloud base is often initially somewhere between the LCL and the CCL. If a thunderstorm forms, then as it grows and matures, processes such as increased saturation at lower levels from precipitation and lower surface pressure usually lead to a lowering of the cloud base.

  7. Ceiling balloon - Wikipedia

    en.wikipedia.org/wiki/Ceiling_balloon

    A fully inflated ceiling balloon A ceiling balloon cabinet Close up of the filler stand Regulator valve and pressure gauges attached to helium cylinder. A ceiling balloon also called a pilot balloon or pibal, is used by meteorologists to determine the height of the base of clouds above ground level during daylight hours.