Model prediction for impact parameters as a function of N_H I and absorption metallicity. The blue-filled contours indicate the 99th, 95th, and 68th percentiles of the model distribution of CNM absorbers. The dashed contours in gray mark the percentiles of the model distribution of overall H I absorbers. Red and black data points show CNM and H I absorbers (Møller & Christensen 2020), respectively, with identified emission counterparts. The open circles in the left panel show data points for GRBs from Lyman et al. (2017). The majority of the GRBs do not have metallicity measurements and are therefore not shown in the right panel.