333194fc_Cumulus_ini___CumulusWiki__Function
[Parameter Line Entry] DisplayCloudBase=0 [Function] 
Set in the Display Configuration Screen General block. 0 = Disabled, (default) 1 = Enabled, the calculated cloud base is displayed on the main screen. The calculation is a simple one; 1000 feet for every 4.5 degrees Fahrenheit difference between the temperature and the dew point.
Cumulus.ini - CumulusWiki
Function