Although the studied environments are initially supportive of supercells, the merging of outflows soon renders a predominant linear forcing. Thereafter, alongline flow within the system's cold pool entails backbuilding on both the mesoscale and the convective scale. As well, alongline flow in the upper troposphere within the system entails alongline hydrometeor transports, especially in the leading and trailing anvils. These behaviors lead to the archetypal structure of a convective line with parallel precipitation. Alongline hydrometeor advection means that much of the system's precipitation falls very near its outflow boundary, and that the convective cells can seed other updrafts farther down the line. As a result, convective systems in lineparallel shear can intensify their cold pools quite rapidly. As well, in time the convective line begins to possess diminished upper tropospheric alongline flow within its axis. These factors may hasten transition toward a predominantly rearwardsloped updraft and the production of trailing precipitation. Even in the absence of Coriolis accelerations, this kind of convective evolution in environments with line-parallel shear will lead to highly asymmetric structures, such as are commonly observed in midlatitudes.