Orographic retardation of a cold atmospheric front

The propagation of a cold front over a mountain is simulated by a local non-hydrostatic finite difference model. New conservative difference operators are proposed for the advection terms inside the computational domain. Temperature transport is calculated with semi-Lagrangian scheme and data produced by the finite difference model. Comparisons are made between model calculations and theoretical and experimental results obtained by other authors. The model realistically describes the effect of orography on the front propagation.