Daily Gridded Precipitation Analysis over the U.S. (1996--2002)

SOURCE:River Forecast Center: ~6000 gauge stations per day and 
Climate Anomaly Data Base: ~several hundred gauge stations per day

 via Climate Prediction Center (CPC) Retrospective Analysis:
http://www.cpc.ncep.noaa.gov/products/precip/realtime/retro.html

FORMAT: NetCDF

GRID:    .25 x .25 degree grid

         Domain: (140W-60W, 20N-60N)

LEVELS: Surface

FIELDS: Description                     Name 	Units       Levels
        --------------------------------------------------------------------
	daily accumulated Precipitation	Precip	inches/day  surface

TIMES: 1 value per day; 28,29,30 or 31 values per month

MSS Directory: /CA/PRECIP/CPC/US_DAILY

Filename: usd.precip.YYYYMM.nc, where YYYY is the 4-digit year, MM is 2-digit month,

   e.g. usd.precip.199901.nc contains the data for Jan 1999 (31 times).

Current holdings:  Jan 1996 -- Dec 2002

References: 

R. W. Higgins, W. Shi, E. Yarosh, R.Joyce, 2000:
"Improved United States Precipitation Quality Control System and Analysis",
NCEP/Climate Prediction Center ATLAS No. 7, U. S. DEPARTMENT OF COMMERCE,
National Oceanic and Atmospheric Administration, National Weather Service 

link to NCEP/CPC Atlas.

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