Obtain tabular data from the U.S. Cooperative Observer Network consisting of the National Centers for Environmental Information climate normals, temperature and precipitation extremes and threshold climatologies. The source of the data in these products comes from the U.S. Cooperative Network, augmented by observations from the relatively small number of NWS sites. These cooperative sites are operated by volunteer observers using approved instruments and observing techniques. It is only through their efforts that we have long-term data for such a large number of sites.

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