The High Altitude LIDAR Observatory (HALO) dataset provides observations on aerosols and water vapor. The HALO instrument was carried aboard NASA’s Gulfstream III (G-III) research aircraft. HALO is used to characterize distributions of atmospheric composition. From an airborne platform, the HALO instrument provides nadir-viewing profiles of water vapor and profiles of aerosol and cloud optical properties. These data were collected as part of the North American Upstream Feature-Resolving and Tropopause Uncertainty Reconnaissance Experiment (NURTURE). The NURTURE campaign is focused on quantifying the impact that perturbations poleward of the jet stream have on jet stream variability and high impact weather events. NURTURE will provide the first mesoscale observations of antecedent tropopause structure and near-jet environment that lead to high impact weather events. NURTURE will target tropopause polar vortices, dynamics supporting jet superpositions, mesoscale stratosphere-troposphere interactions, and diabatic processes (ESPO 2026). The HALO NURTURE dataset files are available from January 24, 2026, through February 19, 2026, in HDF5 format.