Comparison of the Spitzer-IRS mid-IR spectrum of the tip of HH 211 outflow from Tappe et al. (2008) (black lines) and of a synthetic GROSBETA spectrum for OH (in red) and H₂O (in blue). The best fit parameters are indicated in the top right parts of the panels. The GROSBETA spectra are plotted assuming a source size equal to the extraction aperture ΔΩ = 1.9 × 10⁻⁹ sr. The rotational quantum number N_up are indicated for some OH lines. The model reproduces well the OH lines at 10–16 μm, but underproduces them at longer wavelengths.