The morphology of a finite array of plasma density enhancement (multiple plasma clouds) in the ionosphere is studied in order to determine the condition under which the system undergoes a quasi steady state E¿B drift. In such a system the polarization-induced self-electric field inside all the plasma clouds must be essentially equal and uniform. The method of image dipoles previously developed for multiple equatorial spread F bubbles is used to calculate the instantaneous electric field exactly. It is found that even for small separation distances for which the intercloud interaction is significant, the electric field remains nearly uniform both internally and from cloud to cloud for typical ionospheric plasma cloud parameters, so that the multiple plasma cloud drift in unison without changing their geometrical shapes. This constitutes a quasi steady state configuration. The implications to the behavior of late time plasma cloud striations are discussed.