NCEP ADP Global Surface Observations, February 1975 - continuing

NCAR's Data Support Section (DSS) presents a global synoptic set of surface data reports. These were operationally collected by National Centers for Environmental Prediction (NCEP) into three-hourly or six-hourly files, which in recent years can include hourly and even some 20-minute reports. They include land and marine reports received via the Global Telecommunications System (GTS). This dataset is DSS' primary surface observation set. Please see the external link for more information on this data set.