National Temperature Index


USCRN Background

station plot

The U.S. Climate Reference Network (USCRN) The U.S. Climate Reference Network (USCRN) is a network of climate stations deployed by NOAA's National Centers for Environmental Information (NCEI) with engineering partner NOAA's Atmospheric Turbulence and Diffusion Division (ATDD). The USCRN's primary goal is to provide future long-term homogeneous temperature and precipitation observations that can be coupled to long-term historical observations for the detection and attribution of present and future climate change.

Data from the USCRN is used in operational climate monitoring activities and for placing current climate anomalies into an historical perspective. The USCRN provides the United States with a reference network that meets the requirements of the Global Climate Observing System (GCOS). The network consists of 114 commissioned stations in the contiguous United States, 12 stations in Alaska, 2 experimental stations in Hawaii, and 2 international exchange sites in Egbert, Ontario, Canada, and Tiksi, Sakha, Russia. More stations continue to be added in Alaska as the network expands to cover the state with a network similar in spatial resolution to the contiguous U.S. network.

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