The results of the experimental investigation of EHD flows arising in a system with a highly nonuniform electric field are presented. A high degree of the nonuniformity distribution of the electric field is obtained due to using an active needle electrode with a 3 mu m curvature radius. The stationary and dynamic current-voltage characteristics and the dependence of the EHD flow velocity on the voltage are obtained. It is shown that, at a high rate of the voltage modulation, the dynamic current-voltage characteristics have a hysteresis. The investigation of the electron-acceptor admixture's influence on the form of the current-voltage characteristics and the intensity of the EHD flows is conducted. A return EHD flow arising after the voltage's turning off is recorded. The obtained results are compared with similar data in the literature for the case of less nonuniform electric fields.