The regional model of the atmospheric dynamics is presented. The model is a component of the global climatic model ECSib, has the increased spatial resolution and is designed for the reproduction of the climatic atmospheric characteristics on spatial scales not described by the global model. In the model, the processes of interaction with the surface are taken into account in more detail. The surface and active layers of soil take into account the presence of vegetative cover, layer of snow on the surface, processes of heat and moisture transfer in the soil layer, processes of melting of snow on the surface, receipt of moisture into the soil at the expense of the large-scale and convective precipitation, interception of precipitation by the vegetative cover, effects of moisture filtration. Some results of numerical modeling of Siberia climate are presented.