The dryline was located within a persistent virtual potential temperature gradient, which solenoidally forced a thermally direct secondary circulation. The analyses show substantial along-line variability in the frontogenetical forcing that produces and extends the dryline gradient downstream. The secondary dryline-normal circulation was enhanced in regions of strong frontogenesis, increasing moisture lift within the updraft collocated with the dryline. The secondary circulation also enhanced top-down entrainment of dry air in the downdraft on the downstream (moist) side of the dryline. The boundary layer surrounding the dryline exhibited a complex, evolving organization consisting of varying combinations of open dry convective cells and horizontal convective rolls (HCRs). A field of updrafts and vortices were observed to move northward along and interact with the dryline to produce small-scale waves. The resulting deepening of moisture on the northern flank and drying on the southern flank of a vortex may be potentially important to convection initiation.