The antarctic Peninsula is a formidable barrier to the easterly flow of stable air over the Weddell Sea. The damming up of cold stable air against the peninsula mountains creates a pressure field which provides the necessary dynamic support of strong, mountain-parallel winds often observed along the east side. Numerical experiments, using a two-dimensional (x, z) primitive equation model incorporating a cross section of the terrain of the Antarctic Peninsula, are carried out in attempt to simulate the principle features of these barrier winds. Implications of the wind field are discussed.