Abstract During the second half of 1987, we studied the motions and morphologic changes of features moving relative to a prominent dark oval and its associated “hollow” in Jupiter's North Equatorial Belt (NEB). Approximately 200 photographs and CCD images were analyzed and revealed numerous active, transient, and irregular bright albedo clouds which developed over the NEB between 7° and 11° north planetographic latitudes. These clouds, embedded in a high meridional shear region, had divergent motion fields with north-south intrinsic outflow motions. Moving at higher velocities than the oval, which was located at 16.4°N, they overtook and passed it, flowing around its southern boundary into the region of the hollow. No interaction, collision, or merging was observed. It is conjectured that the dark oval was a cyclonic vortex (“barge”) and that the bright spots were the result of localized convective activity. Using two “plumes” and one bright spot as tracers, we found evidence of abnormal high zonal velocities at 7°N in September 1987, with u ≈ 109 and 117 m sec −1 . This could be related to the local activity of the features or to a transient increase in the magnitude of the equatorial jet at this latitude by ≈10 m sec −1 .