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HOME > Monitoring and Data > U.S. Climate Data > Precipitation & Temperature > Daily Precipitation Analysis > U.S. Precipitation Quality Control System > Retrospective Analyses
 
Retrospective Analyses Banner
 
 
In support of climate monitoring, climate prediction and applied research, the Climate Prediction Center has developed several retrospective analyses at daily time scales:

	* U.S. hourly precipitation (HPD) analysis (1948-March, 1999)
	* U.S. daily precipitation analysis(realtime,January,1996-present)
        * U.S. Unified Daily Precipitation Analysis(retrospective,1948-1997)
        * US_Mexico daily precipitation analysis(retrospective, 1948-1990)
	* South American daily precipitation analysis(retrospective,January 1,2000-present) 

These datasets, except for the Unified Daily Precipitation Analysis, are available via anonymous ftp 
at the following site:

	ftp ftp.ncep.noaa.gov
	login: anonymous
	passwd: your e-mail address


for U.S. hourly precipitation analysis  go to /pub/precip/wd52ws/hpd
for realtime U.S. daily precipitation analysis  go to /pub/precip/wd52ws/us_daily
for retrospective US_Mexico daily precipitation analysis go to /pub/precip/wd52ws/us-mex
for retrospective South American daily precipitation analysis go to /pub/precip/wd52ws/SA



The Unified Daily Precipitation Analysis over the U.S. is available. However, the size of the dataset is prohibitive. While CPC cannot assume the responsibility of servicing the data needs of the climate commun ity, we have made arrangements with several established data distribution centers. CDC has tra nsferred the dataset to NetCDF format and is currently hosting it on their web site (http://www.cdc.noaa.gov/c dc/data.unified.html). UCAR JOSS is hosting the dataset under the CODIAC system (http://www.joss.ucar.edu/ codiac). CPC has also contacted NCDC about hosting the dataset.

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Page last modified: August 14, 2002
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