The GPM Ground Validation CAX1 Radar ODIM format OLYMPEX dataset consists of radar parameters, such as Radar reflectivity, Doppler velocity, Doppler width, Differential reflectivity, Differential phase, Differential phase shift, Correlation coefficient, and Signal Quality Index, provided on a 0.4 to 1.0 km spatial resolution within the OLYMPEX field campaign study region in state of Washington. These data were obtained for the GPM Ground Validation OLYMPEX field campaign by the SELEX Meteor 60DX10 Compact Weather (CAX1) radar. The CAX1 radar was located at the southern tip of Vancouver Island on the Canadian Forces Base (CFB) Esquimalt Albert Head (AHD) military training area. These data are available in ODIM HDF-5 format, and have corresponding browse imagery in PNG format, from November 14, 2015 through April 1, 2016.