A limited area nonlinear normal mode initialization

The paper presents a method of nonlinear normal mode initialization which is used in the operational technology of the regional numerical weather prediction for the Siberian region. This technology has been developed at the Siberian Hydrometeorological Research Institute. The comparison of results of forecasting with the use of the initialization method and without it has been made. The method allows the efficient suppression of the amplitudes of high-frequency oscillations at the initial integration stage, the maximal changes in the field of the surface pressure not exceeding 1-2 hPa.