Snow is modeled using S.S. Grigoryan's plastic compressible medium with nonlinear equations of state different for loading and unloading also capable of shear deformation. The adequacy of equation of state in the pressure range from tens to some hundreds megapascals is verified using comparison of one-dimensional plane problem's numerical solution of snow pack impact loading and available experimental data. The numerical solution's results of spherical explosion of blasting charge in snow are presented. Time-history dependences of radial and tangential stresses into the points located on the different distances from charge are analyzed. The analysis results are compared with data of experimental investigations.