Why are winter winds near Novorossiysk especially strong?

The winter winds near Novorossiysk are exceptionally strong because they are a form of bora, which is a powerful katabatic wind.12

These winds occur when cold, dense air—often originating from spurs of the Siberian anticyclone—accumulates over elevated land surfaces or plateaus and spills over into lower-lying, warmer regions. As this cold air descends the coastal slopes toward the Black Sea, it accelerates, reaching hurricane-force speeds. This phenomenon is driven by the sharp contrast between the cold, high-pressure air mass inland and the relatively milder conditions over the sea.23