In the context of the non-hydrostatic MM5,the mixed ice phase,graupel(gsfc),graupel(reisner2)and schultz schemes are used to explore the impact of explicit schemes of cloud precipitation on the uncertainties in the numerically simulated idealized convective storm with full explicit approach.The numerical results show that there are signicicant uncertainties in the evolution of horizontal structure,rain,cloud prognostic variables and thermal and dyinamical fields.Therefore,explicit forecasts of precipitation,especially ensemble prediction of precpitation,should be performed together with the estimation of different uncertainties of different explicit schemes.