A regional model of atmospheric dynamics is presented. The model is a component of the global climatic model ECSib [A.A. Fomenko and V.N. Krupchatnikov, Bull. Nov. Comp. Center, Num. Model Atmos., etc. 1, 17–31 (1993); A.A. Fomenko, V.N. Krupchatnikov, and A.G. Yantzen, Bull. Nov. Com. Center, Num. Model Atmos. etc. 4, 11–19 (1996)], has increased spatial resolution, and is designed to reproduce the climatic atmospheric characteristics on spatial scales not described by the global model. The model gives a more detailed account of processes of interaction with the underlying surface. The surface ground layer and active ground layer in the model allow for the presence of vegetative cover, a layer of snow on the surface, processes of heat and moisture exchange in the ground layer, processes of thawing of snow on the surface, uptake of moisture by the ground due to large-scale and convective precipitations, capture of precipitations by the vegetative cover, and effects of filtration of moisture into the ground [V.N. Krupchatnikov and A.G. Yantzen, "Parametrization of Interaction Processes of the Atmosphere and Earth's Surface in the General Circulation Model (ECSib)," Preprint No. 1013, Computational Center of RAS, Novosibirsk (1994)]. A series of results of numerical simulation of the climate of Siberia is presented.