Line widths (upper panel) and column densities (lower panel) as a function of radial velocity for clumps along Stripe (a) as defined in Fig. 13. Head-tail clouds are marked with a triangle. For the line widths we computed a linear fit through all data points (solid line) and through HT clouds only (dotted line), respectively. For the column densities we calculated the 90% percentiles as in Fig. 12 to parameterize the upper envelope. The solid line is the best-fit linear relation of vs. v_gsr neglecting the outlier at v_gsr ≈ −130 km s^-1.