NCEP/CPC Four Kilometer Precipitation Set, Gauge and Radar

A prototype, real-time, hourly, multi-sensor National Precipitation Analysis has been developed at the National Centers for Environmental Prediction (NCEP) in cooperation with the Office of Hydrology (OH). This analysis merges two data sources that are currently being collected in real-time by OH and NCEP. Approximately 3000 automated, hourly rain gauge observations are available over the contiguous 48 states via the GOES Data Collection Platform, and ASOS. In addition, hourly digital precipitation (HDP) radar estimates are obtained as compressed digital files via the AWIPS network. The HDP estimates are created by the WSR-88D Radar Product Generator on a 131 by 131 4 km grid centered over each radar site. The data analysis routines, including a bias correction of the radar estimates using the gage data, have been adapted by NCEP on a national 4 km grid from algorithms developed by OH ("Stage II") and executed regionally at NWS River Forecast Centers.Since January 1, 2002, the Stage IV analysis data became available and are added to the archive. This precipitation data are received through UCAR/EOL.

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Temporal Range

  • Begin:  1995-01
    End:  2025-06

Keywords

Resource Type dataset
Temporal Range Begin 1995-01
Temporal Range End 2025-06
Temporal Resolution N/A
Bounding Box North Lat N/A
Bounding Box South Lat N/A
Bounding Box West Long N/A
Bounding Box East Long N/A
Spatial Representation N/A
Spatial Resolution N/A
Related Links

Related Resource #1 : NCEP's national multi-sensor hourly precipitation analysis

Related Resource #2 : EOL codiac dataset: GCIP/EOP Surface: Precipitation NCEP/EMC 4KM Gridded Data (GRIB) Stage IV Data
Additional Information N/A
Resource Format WMO GRIB1
Standardized Resource Format GRIB
Asset Size 176962.584 MB
Legal Constraints

Creative Commons Attribution 4.0 International License
Access Constraints None
Software Implementation Language N/A

Resource Support Name N/A
Resource Support Email datahelp@ucar.edu
Resource Support Organization N/A
Distributor NSF NCAR Geoscience Data Exchange
Metadata Contact Name N/A
Metadata Contact Email datahelp@ucar.edu
Metadata Contact Organization NSF NCAR Geoscience Data Exchange

Author Cooperative Distributed Interactive Atmospheric Catalog System, Earth Observing Laboratory, National Center for Atmospheric Research, University Corporation for Atmospheric Research
Climate Prediction Center, National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce
Publisher NSF National Center for Atmospheric Research
Publication Date 2000-11-15
Digital Object Identifier (DOI) https://doi.org/10.5065/D69Z93M3
Alternate Identifier d507005
Resource Version N/A
Topic Category climatologyMeteorologyAtmosphere
Progress onGoing
Metadata Date 2025-10-09T01:37:19Z
Metadata Record Identifier edu.ucar.gdex::d507005
Metadata Language eng; USA
Suggested Citation Cooperative Distributed Interactive Atmospheric Catalog System, Earth Observing Laboratory, National Center for Atmospheric Research, University Corporation for Atmospheric Research, Climate Prediction Center, National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce. (2000). NCEP/CPC Four Kilometer Precipitation Set, Gauge and Radar. NSF National Center for Atmospheric Research. https://doi.org/10.5065/D69Z93M3. Accessed 11 October 2025.

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