Reference Climatological Stations

The Reference Climatological Stations (RCS) network represents the first effort by NOAA to create and maintain a nationwide network of stations located only in areas where no changes in the surroundings are foreseen. Efforts to establish the network began in 1954 by the National Weather Service. The network became operational in 1966 with the selection of fifteen stations from a list of 28 candidate sites; six more were added as the network expanded. Most stations were located at university agricultural experiment stations. Core data elements include temperature, rainfall, and wind speed & direction. Some stations also measured evaporation and soil temperature. Observations were taken daily by volunteer observers, and were a subset of the extensive NWS Cooperative Observations network. Stations were assigned Cooperative Station IDs, but were provided with special forms on which to record wind speed and direction, elements not recorded at other Coop stations.