Integrated Surface Data processing has been delayed. This affects Global Hourly data, Global Summary of the Day (GSOD), and Local Climatological Data (LCD). We anticipate data to be updated late this week or over the weekend.
The U.S. Historical Climatology Network (USHCN) data are used to quantify national- and regional-scale temperature changes in the contiguous United States (CONUS). The USHCN is a designated subset of the NOAA Cooperative Observer Program (COOP) Network with sites selected according to their spatial coverage, record length, data completeness, and historical stability.