Studying intensive convection in Perm krai using the WRF model

Analyzed is a development of cloud convective system of short duration accompanied by severe thunderstorms, showers, squalls up to 22 m/s, and hail with the diameter reaching 20 mm and more in the afternoon on June 9, 2012 on the territory of Perm krai. An assessment of the convection development using the WRF-ARW model demonstrated that it simulates adequately the formation of convective systems on the territory of Perm krai. However, the zones of intensive precipitation coincide with its actual distribution not always. The Grell-Devenyi parameterization of convection gives the best results. The model does not simulate the hail formation processes: despite the fact of the development of this phenomenon on the territory of Perm krai on June 9, 2012, no hail formation was predicted by the model computations within the computational domain.