W pracy omówiono rozwój sytuacji synoptycznej, która doprowadziła do powstania sztormu 13–14 października 2009 roku, oraz scharakteryzowano zmienność warunków hydrometeorologicznych, które wystąpiły w okresie poprzedzającym sztorm, w czasie sztormu i w okresie posztormowym nad obszarem zachodniej części Zatoki Gdańskiej.
This work presents the development of synoptic situation which resulted in storm in the region of western part of the Gdańsk Gulf on 13–14 October 2009 and characterizes the changeability of hydro-meteorological conditions in the period preceding the storm, during the storm noted on 13–14 October and in the period just after the storm. This work has made use of the data of the observation net of the Maritime Office in Gdynia. The depression responsible for the stormy weather on the south Baltic Sea was following the Vb trajectory according to van Bebber classification (Fig. 2) and the storm developed on the edge of high pressure area with its centre over Scandinavia (Fig. 6). The maximum wind speed was noted on 14 October and in the North Port in Gdansk it reached the value of 32 mźs–1 (Fig. 3). The wind was very gusty. A few-day lasting stormy N-NE winds (Fig. 4) resulted in very high seas. On 14 October the significant wave reached 4.2–4.3 m and the maximum wave was 7.8–7.9 m high. The storm overflows exceeded the alarm states of water (Fig. 7). There were some disturbances in the work of the ports of Gdynia and Gdańsk, destruction of some hydro-technical equipment, tourist infrastructure and rapid abrasion of coasts.