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.
Volume details by dataset productVolume details by dataset productOriginal stage IV analysis katz.tar file from NCEP: 79.2 GBGridded national precipitation analysis 4km data from katz.tar file, ending Dec 2001: 7.07 GBSnapshot gif files from katz.tar file, ending 20200728.11Z: 3.16 GBDaily precipitation data from katz.tar file: 789.4 MBHourly precipitation data from katz.tar file: 5.73 GBST2_4km grib data from katz.tar file, starting Jan 2002, ending 20200728.11Z: 41.34 GBST4 grib,grib2 data from katz.tar file, grib:20020101.00z-20200728.11Z, grib2:20200720.00z on: 21.99 GB
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