There are some important sources of oceanic baroclinic waves such as barotropic tides, shear instability, atmospheric impact, generation by local initial disturbances, exciting by oscillations of buoyancy fluxes, production of internal waves by stationary stratified currents and some others.A new mechanism of generation of internal waves (IWs) has been formulated recently by Nash and Moum (2005) who reported observation of packets of IWs in the area of the Columbia River plume and assumed that they are probably generated in the coarse of transition from supercritical to subcritical regime of evolution.The groups of these waves are regularly observed in the area by Synthetic Aperture Radars.