Compared to potential temperature (θ) in the dry atmosphere and equivalent potential temperature (θe)in the saturated atmosphere,generalized potential temperature (θ*) has already proven a better thermodynamic parameter in describing the non-uniformly saturated real atmosphere.To add otherwise absent graphic explanations,this paper first presents the physical definition of θ* through a tephigram.Then,the utility of the measurement in identifying and forecasting the locations of precipitation maxima and heat wave areas with diagnostic comparison studies and traditionally used thermodynamic parameters is shown.