In conjunction with Dr. Knupp of the University of Alabama, the Principal Investigator will conduct an observational and numerical modeling study of deep convective storms. Specific objectives include: Investigate the effects of condensate loading/unloading and phase change on updraft/downdraft vertical acceleration. Using advanced radar techniques, determine the mix of various hydrometeor species within deep convection. Develop and apply a radar scan simulation model which will be used to evaluate the accuracy of wind and hydrometeor fields derived from the respective multiple Doppler and multi-parameter radar analyses. If successful, this research will help clarify the relationships and interactions between the thermodynamics and microphysics of deep convective storms.