Distribution of weather stations in the IdF region used in this study. The grey areas are drawn from the CORINE land cover dataset at its native resolution of 250 m. Stations whose names are shown in red are not contained in the data assimilation process of the ECMWF HRES and the NCEP operational global observation subsets used in the OBSGRID program. DOI: https://doi.org/10.1525/elementa.319.f2