: ncrnd = 0 ]

   iseed        Integer seed used in generating random numbers
                -- used only when ncrnd > 0
                [integer, default: iseed = 123 ]

   krmin        Index of the top most level to which random clouds may
                be invoked
                [integer, default: krmin = 2 ]

   krmax        Index of the bottom most level to which random clouds 
                may be invoked. krmin should be <= krmax. 
                If ncrnd is specified as zero, then all cloud-ty