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NWS Hydrometeorological Design Studies Center (HDSC)
   -HDSC General Information Site
   -Precipitation Return Periods
   -Precipitation Frequency
   -Precipitation Frequency Data Server
   -Probable Maximum Precipitation
   -Record Rainfalls


Example of PRISM Field

Oregon State University
PRISM (Parameter-elevation Regressions on Independent Slopes Model)

   -RFC Use of PRISM (2.6mb pdf)
   -Precipitation Monthly Means
   -Temperature Monthly Means