PRISM: Creating Temperature Files
PRISM's data prep routines are used to convert daily temperature data to PRISM-ready format. Although all possible data formats cannot be accommodated, an updated external PRISM data prep routine covers formats currently used by NOAA. Procedures to convert text files of columnar temperature data (i.e. produced in EXCEL, SPSS, or SAS), a utility that speeds the updating of temperature data, and an editor to use with small ASCII files, are also included in the Data Prep Menu in PRISM.
NOAA to TPS
In 1998, after publication of the PRISM Users Guide, NOAA revised the system of providing temperature data to users. Users may request data from NOAA's National Climatic Data Center (NCDC) located at http://www.ncdc.noaa.gov/cdo-web/search?datasetid=GHCND. Files are available for a fee, except those on an .EDU domain. EDU users have free access to all NOAA data.
We recommend using only First Order Summary of the Day Temperature Data (TD-3210) from primary weather stations. Primary stations are typically located at airports and military installations. These stations have been collecting data for many years (some since 1948), the data is now collected electronically, has undergone quality control procedures by NOAA and is considered to be the most reliable. You should collect at least 10 years of average or min/max daily temperatures in order to create a 10-year normalization period and cover the period of your billing data. We currently recommend acquiring daily data for January 1998 through the latest dates available from NOAA,