Based on the conventional observational data, wind profile data and NCEP / NCAR1°×1° reanalysis data, a strong wind process happened over the Yellow and Bohai Seas on 1 October 2015 is analyzed. Results show that the largescale baric gradient wind caused by the cold air and rapidly growing surface cyclone led to the gale.The strong cold advection area is corresponding to the ground allobaric wind. The whole layer cold advection caused the strong pressure gradient and allobaric gradient on the ground. Pressure gradient played a leading role in the early wind process, and allobaric gradient was conducive to the maintenance of strong winds and downward propagation of upper level momentum occurred in this process; the lower level winds at 500 to 1000 meters affected the surface wind, and the wind above 2000 meters affected the surface wind after the trough crossing. The wind profile observations of lowlevel strong winds accompanied by strong subsidence movement can be used as an indicator of high sea wind warning.