We report on the results of a statistical investigation of high-latitude traveling ionospheric convection vortices measured by the west coast Greenland magnetometer chain during the year 1996. The events were selected using a data-fitting procedure which identifies vortex-like structures in the ionospheric current distribution. The procedure identified about 22,150 vortices during 1996. For each vortex event, we compute the average value of the current and the average northward and eastward speed, and the standard deviations of the parameters are also computed. We investigate the local time and solar wind dependence of the vortex strength and movement. The solar wind speed appears to be the primary factor which correlates best with the field-aligned current strength related to individual ionospheric vortices. Increasing solar wind speed increases the vortex occurrence, as well as vortex intensity in all dayside local time sectors. The dependence is the strongest in the noon sector, followed by the morning and evening sectors. The interplanetary magnetic field (IMF) Bz component has a nearly comparable influence on vortex strength as the solar wind speed; however, this is observed primarily in the noon sector. The final factor which we have found to correlate with vortex occurrence and strength is the standard deviation of the magnetic field.