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The cloudbase is the lowest altitude of the visible portion of the cloud. It is traditionally expressed either in m or feet above mean sea level (or planetary surface), or as the corresponding pressure level in hectopascal (hPa, equivalent to millibar).
Formula:
Cloud Base = ( ( Temperature - Dew point ) / 4.4 ) * 1000 )
Where,
Temperature: the amount of heat or cold measured on a thermometer.
Dew point: the temperature to which air must be cooled for saturation to occur.
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