These data include a mix of CoCoRaHS, COOP and ASOS observations. CoCoRaHS data are provided courtesy of a program originated by the Colorado Climate Center at Colorado State University. These data are not part of official NWS observation programs and are considered supplemental and unofficial. COOP and ASOS data are provided through official NWS observation programs. However, as part of the NWS certification process, these data are considered preliminary and unofficial until they have gone through final quality control by NCDC. Therefore, these data are subject to revision. Final and certified climate data can be accessed at NCDC.