Аннотация:The analysis of the circulation conditions also allowed to work out the synoptic classification. According to this classification all the variety of the synoptic processes was combined into four classes: Azores, North-Atlantic, Siberian and Arctic. For each class the typical schemes of the synoptic processes and forecasting maps of the geopotential difference on the H1000 between the European Part of Russia and Novorossiysk were obtained before 48 hours to the beginning of the Bora. It was shown, that the most complicated situations for the prediction concerned with the entrance of the active anticyclones of the Arctic class to the European part of Russia, and the most successful forecasts concerned with the stationary anticyclones of the Siberian class.